diff --git a/.hgtags b/.hgtags
--- a/.hgtags
+++ b/.hgtags
@@ -320,8 +320,71 @@
 e571552c235724fbce9b1ceaedf4bff73093eaa7 FIREFOX_BETA_136_BASE
 8502d5cd5759d33e1c180121ddf0c12be23ccae3 FIREFOX_NIGHTLY_136_END
 55ed172f026357b4adecadea071cb51085f15c77 FIREFOX_BETA_137_BASE
 01a30eea5505e9ed21e2d5b8608a0146d6f6013a FIREFOX_NIGHTLY_137_END
 f27925f3d6f792efb037cdb55bb98b972c11c1c6 FIREFOX_BETA_138_BASE
+dbb513f75f1319fedf0299e772657a6baed54bf0 FIREFOX_BETA_137_END
+b8d898dd79394647a98f4f2fb4df8cd8fb1a1c87 FIREFOX_138_0b1_BUILD1
+b8d898dd79394647a98f4f2fb4df8cd8fb1a1c87 DEVEDITION_138_0b1_BUILD1
+b8d898dd79394647a98f4f2fb4df8cd8fb1a1c87 FIREFOX-ANDROID_138_0b1_BUILD1
+b8d898dd79394647a98f4f2fb4df8cd8fb1a1c87 FIREFOX-ANDROID_138_0b1_RELEASE
+b8d898dd79394647a98f4f2fb4df8cd8fb1a1c87 FIREFOX_138_0b1_RELEASE
+b8d898dd79394647a98f4f2fb4df8cd8fb1a1c87 DEVEDITION_138_0b1_RELEASE
+f3665b1241b4fbe0b99edc6c6053d5dd0fa87a09 FIREFOX-ANDROID_138_0b2_BUILD1
+f3665b1241b4fbe0b99edc6c6053d5dd0fa87a09 FIREFOX_138_0b2_BUILD1
+f3665b1241b4fbe0b99edc6c6053d5dd0fa87a09 DEVEDITION_138_0b2_BUILD1
+f3665b1241b4fbe0b99edc6c6053d5dd0fa87a09 FIREFOX_138_0b2_RELEASE
+f3665b1241b4fbe0b99edc6c6053d5dd0fa87a09 FIREFOX-ANDROID_138_0b2_RELEASE
+f3665b1241b4fbe0b99edc6c6053d5dd0fa87a09 DEVEDITION_138_0b2_RELEASE
+901cf77298fcbbe79b2764087ffccb02613cb460 FIREFOX-ANDROID_138_0b3_BUILD1
+901cf77298fcbbe79b2764087ffccb02613cb460 FIREFOX_138_0b3_BUILD1
+901cf77298fcbbe79b2764087ffccb02613cb460 DEVEDITION_138_0b3_BUILD1
+901cf77298fcbbe79b2764087ffccb02613cb460 FIREFOX-ANDROID_138_0b3_RELEASE
+901cf77298fcbbe79b2764087ffccb02613cb460 FIREFOX_138_0b3_RELEASE
+901cf77298fcbbe79b2764087ffccb02613cb460 DEVEDITION_138_0b3_RELEASE
+e2090d24f8235f0dba16f77633467e4dbc1c0411 FIREFOX-ANDROID_138_0b4_BUILD1
+e2090d24f8235f0dba16f77633467e4dbc1c0411 FIREFOX_138_0b4_BUILD1
+e2090d24f8235f0dba16f77633467e4dbc1c0411 DEVEDITION_138_0b4_BUILD1
+e2090d24f8235f0dba16f77633467e4dbc1c0411 FIREFOX-ANDROID_138_0b4_RELEASE
+e2090d24f8235f0dba16f77633467e4dbc1c0411 DEVEDITION_138_0b4_RELEASE
+e2090d24f8235f0dba16f77633467e4dbc1c0411 FIREFOX_138_0b4_RELEASE
+7aedb899c00f58e81305c51945c3155b337593f3 FIREFOX-ANDROID_138_0b5_BUILD1
+7aedb899c00f58e81305c51945c3155b337593f3 FIREFOX_138_0b5_BUILD1
+7aedb899c00f58e81305c51945c3155b337593f3 DEVEDITION_138_0b5_BUILD1
+7aedb899c00f58e81305c51945c3155b337593f3 FIREFOX-ANDROID_138_0b5_RELEASE
+7aedb899c00f58e81305c51945c3155b337593f3 DEVEDITION_138_0b5_RELEASE
+7aedb899c00f58e81305c51945c3155b337593f3 FIREFOX_138_0b5_RELEASE
+d2681c1bd70571ae27a645a7568eba08ff73e36f FIREFOX-ANDROID_138_0b6_BUILD1
+d2681c1bd70571ae27a645a7568eba08ff73e36f FIREFOX_138_0b6_BUILD1
+d2681c1bd70571ae27a645a7568eba08ff73e36f DEVEDITION_138_0b6_BUILD1
+d2681c1bd70571ae27a645a7568eba08ff73e36f FIREFOX-ANDROID_138_0b6_RELEASE
+d2681c1bd70571ae27a645a7568eba08ff73e36f FIREFOX_138_0b6_RELEASE
+d2681c1bd70571ae27a645a7568eba08ff73e36f DEVEDITION_138_0b6_RELEASE
+c8f9e5fa48e3c57e07f40843a3099e6d4430fdac FIREFOX-ANDROID_138_0b7_BUILD1
+c8f9e5fa48e3c57e07f40843a3099e6d4430fdac DEVEDITION_138_0b7_BUILD1
+c8f9e5fa48e3c57e07f40843a3099e6d4430fdac FIREFOX_138_0b7_BUILD1
+c8f9e5fa48e3c57e07f40843a3099e6d4430fdac FIREFOX-ANDROID_138_0b7_RELEASE
+c8f9e5fa48e3c57e07f40843a3099e6d4430fdac FIREFOX_138_0b7_RELEASE
+c8f9e5fa48e3c57e07f40843a3099e6d4430fdac DEVEDITION_138_0b7_RELEASE
+93357b07080aaf7634cad8746adf36c6fa161066 FIREFOX-ANDROID_138_0b8_BUILD1
+93357b07080aaf7634cad8746adf36c6fa161066 DEVEDITION_138_0b8_BUILD1
+93357b07080aaf7634cad8746adf36c6fa161066 FIREFOX_138_0b8_BUILD1
+93357b07080aaf7634cad8746adf36c6fa161066 FIREFOX-ANDROID_138_0b8_RELEASE
+93357b07080aaf7634cad8746adf36c6fa161066 FIREFOX_138_0b8_RELEASE
+93357b07080aaf7634cad8746adf36c6fa161066 DEVEDITION_138_0b8_RELEASE
+f16f5243929bbe24243335d1d222b6a70df67dfc FIREFOX-ANDROID_138_0b9_BUILD1
+f16f5243929bbe24243335d1d222b6a70df67dfc FIREFOX_138_0b9_BUILD1
+f16f5243929bbe24243335d1d222b6a70df67dfc DEVEDITION_138_0b9_BUILD1
+f16f5243929bbe24243335d1d222b6a70df67dfc FIREFOX-ANDROID_138_0b9_RELEASE
+f16f5243929bbe24243335d1d222b6a70df67dfc DEVEDITION_138_0b9_RELEASE
+f16f5243929bbe24243335d1d222b6a70df67dfc FIREFOX_138_0b9_RELEASE
+3f855852fb812157d70c7ce1435adefea5849cfd FIREFOX_RELEASE_138_BASE
+9f12a9fab080f2d363d7424e25b9ffe85ebc3414 FIREFOX_AURORA_28_BASE
 dce1a8cec5da4af61753f9db5fbe60a85299f1d9 FIREFOX_NIGHTLY_138_END
 2149fbb1f153564d301921fd6d536ba93cbdbb65 FIREFOX_BETA_139_BASE
-6ca7d74193b51df2c011b66b4bc1fe3eb233c90d FIREFOX_NIGHTLY_139_END
+e7de009256a686f4268cc5e6f64568330cbc97a8 FIREFOX_BETA_138_END
+d6c6d7b562866069cda9b152a73ddc3581dc85c3 FIREFOX-ANDROID_139_0b1_BUILD1
+d6c6d7b562866069cda9b152a73ddc3581dc85c3 FIREFOX_139_0b1_BUILD1
+d6c6d7b562866069cda9b152a73ddc3581dc85c3 DEVEDITION_139_0b1_BUILD1
+d6c6d7b562866069cda9b152a73ddc3581dc85c3 FIREFOX-ANDROID_139_0b1_RELEASE
+d6c6d7b562866069cda9b152a73ddc3581dc85c3 FIREFOX_139_0b1_RELEASE
+d6c6d7b562866069cda9b152a73ddc3581dc85c3 DEVEDITION_139_0b1_RELEASE
diff --git a/.arcconfig b/.arcconfig
--- a/.arcconfig
+++ b/.arcconfig
@@ -1,5 +1,5 @@
 {
-  "phabricator.uri" : "https://phabricator.services.mozilla.com/",
-  "repository.callsign": "MOZILLACENTRAL",
+  "phabricator.uri" : "https://phabricator-dev.allizom.org/",
+  "repository.callsign": "FIREFOXBETA",
   "history.immutable": false
 }
diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -1786,15 +1786,10 @@
 pref("browser.partnerlink.campaign.topsites", "amzn_2020_a1");
 
 // Activates preloading of the new tab url.
 pref("browser.newtab.preload", true);
 
-// If an on-train limited rollout of the preonboarding modal is enabled, the
-// percentage of the Mac, Linux, and MSIX population to enroll. Default to 25% of
-// population (2500 / 10000).
-pref("browser.preonboarding.onTrainRolloutPopulation",  2500);
-
 // Show "Download Firefox for mobile" QR code modal on newtab
 pref("browser.newtabpage.activity-stream.mobileDownloadModal.enabled", false);
 pref("browser.newtabpage.activity-stream.mobileDownloadModal.variant-a", false);
 pref("browser.newtabpage.activity-stream.mobileDownloadModal.variant-b", false);
 pref("browser.newtabpage.activity-stream.mobileDownloadModal.variant-c", false);
diff --git a/browser/base/content/test/general/browser_datachoices_notification.js b/browser/base/content/test/general/browser_datachoices_notification.js
--- a/browser/base/content/test/general/browser_datachoices_notification.js
+++ b/browser/base/content/test/general/browser_datachoices_notification.js
@@ -20,12 +20,11 @@
   PREF_BRANCH + "dataSubmissionPolicyAcceptedVersion";
 const PREF_ACCEPTED_POLICY_DATE =
   PREF_BRANCH + "dataSubmissionPolicyNotifiedTime";
 const PREF_TOS_ROLLOUT_POPULATION =
   "browser.preonboarding.onTrainRolloutPopulation";
-const PREF_TOS_ROLLOUT_ENROLLED =
-  "browser.preonboarding.enrolledInOnTrainRollout";
+const PREF_TOS_ENABLED = "browser.preonboarding.enabled";
 
 const PREF_TELEMETRY_LOG_LEVEL = "toolkit.telemetry.log.level";
 
 const TEST_POLICY_VERSION = 37;
 
@@ -122,33 +121,31 @@
 
 add_setup(async function () {
   const isFirstRun = Preferences.get(PREF_FIRST_RUN, true);
   const bypassNotification = Preferences.get(PREF_BYPASS_NOTIFICATION, true);
   const currentPolicyVersion = Preferences.get(PREF_CURRENT_POLICY_VERSION, 1);
+  const TOSEnabled = Preferences.get(PREF_TOS_ENABLED, false);
 
   // Register a cleanup function to reset our preferences.
   registerCleanupFunction(() => {
     Preferences.set(PREF_FIRST_RUN, isFirstRun);
     Preferences.set(PREF_BYPASS_NOTIFICATION, bypassNotification);
     Preferences.set(PREF_CURRENT_POLICY_VERSION, currentPolicyVersion);
     Preferences.reset(PREF_TELEMETRY_LOG_LEVEL);
-    Preferences.reset(PREF_TOS_ROLLOUT_ENROLLED);
-    Preferences.reset(PREF_TOS_ROLLOUT_POPULATION);
-
+    Preferences.set(PREF_TOS_ENABLED, TOSEnabled);
     return closeAllNotifications();
   });
 
   // Don't skip the infobar visualisation.
   Preferences.set(PREF_BYPASS_NOTIFICATION, false);
   // Set the current policy version.
   Preferences.set(PREF_CURRENT_POLICY_VERSION, TEST_POLICY_VERSION);
   // Ensure this isn't the first run, because then we open the first run page.
   Preferences.set(PREF_FIRST_RUN, false);
   TelemetryReportingPolicy.testUpdateFirstRun();
-  // Do not trigger ToS modal for Linux, Mac, and MSIX builds
-  Preferences.set(PREF_TOS_ROLLOUT_ENROLLED, false);
-  Preferences.set(PREF_TOS_ROLLOUT_POPULATION, 0);
+  // Do not enable the TOS modal
+  Preferences.set(PREF_TOS_ENABLED, false);
 });
 
 function clearAcceptedPolicy() {
   // Reset the accepted policy.
   Preferences.reset(PREF_ACCEPTED_POLICY_VERSION);
diff --git a/browser/components/asrouter/modules/FeatureCallout.sys.mjs b/browser/components/asrouter/modules/FeatureCallout.sys.mjs
--- a/browser/components/asrouter/modules/FeatureCallout.sys.mjs
+++ b/browser/components/asrouter/modules/FeatureCallout.sys.mjs
@@ -2372,34 +2372,53 @@
         background:
           "Menu linear-gradient(var(--arrowpanel-background), var(--arrowpanel-background))",
         color: "var(--arrowpanel-color)",
         border: "var(--arrowpanel-border-color)",
         "accent-color": "var(--focus-outline-color)",
+        // Button Background
         "button-background": "var(--button-background-color)",
-        "button-color": "var(--button-text-color)",
-        "button-border": "transparent",
         "button-background-hover": "var(--button-background-color-hover)",
-        "button-color-hover": "var(--button-text-color)",
-        "button-border-hover": "transparent",
         "button-background-active": "var(--button-background-color-active)",
-        "button-color-active": "var(--button-text-color)",
-        "button-border-active": "transparent",
-        "primary-button-background": "var(--color-accent-primary)",
+        "button-background-disabled": "var(--button-background-color-disabled)",
+        // Button Text
+        "button-color": "var(--button-text-color)",
+        "button-color-hover": "var(--button-text-color-hover)",
+        "button-color-active": "var(--button-text-color-active)",
+        // Button Border
+        "button-border": "var(--button-border-color)",
+        "button-border-color": "var(--button-border-color)",
+        "button-border-hover": "var(--button-border-color-hover)",
+        "button-border-active": "var(--button-border-color-active)",
+        "button-border-disabled": "var(--button-border-color-disabled)",
+        // Primary Button Background
+        "primary-button-background": "var(--button-background-color-primary)",
+        "primary-button-background-hover":
+          "var(--button-background-color-primary-hover)",
+        "primary-button-background-active":
+          "var(--button-background-color-primary-active)",
+        "primary-button-background-disabled":
+          "var(--button-background-color-primary-disabled)",
+        // Primary Button Color
         "primary-button-color": "var(--button-text-color-primary)",
-        "primary-button-border": "transparent",
-        "primary-button-background-hover": "var(--color-accent-primary-hover)",
         "primary-button-color-hover": "var(--button-text-color-primary)",
-        "primary-button-border-hover": "transparent",
-        "primary-button-background-active":
-          "var(--color-accent-primary-active)",
         "primary-button-color-active": "var(--button-text-color-primary)",
-        "primary-button-border-active": "transparent",
+        "primary-button-color-disabled": "var(--button-text-color-primary)",
+        // Primary Button Border
+        "primary-button-border": "var(--button-border-color-primary)",
+        "primary-button-border-hover":
+          "var(--button-border-color-primary-hover)",
+        "primary-button-border-active":
+          "var(--button-border-color-primary-active)",
+        "primary-button-border-disabled":
+          "var(--button-border-color-primary-disabled)",
+        // Links
         "link-color": "LinkText",
         "link-color-hover": "LinkText",
         "link-color-active": "ActiveText",
         "link-color-visited": "VisitedText",
         "icon-success-color": "var(--attention-dot-color)",
+        // Dismiss Button
         "dismiss-button-bg":
           "Menu linear-gradient(var(--arrowpanel-background), var(--arrowpanel-background))",
         "dismiss-button-bg-hover":
           "Menu linear-gradient(color-mix(in srgb, currentColor 14%, var(--arrowpanel-background)))",
         "dismiss-button-bg-active":
diff --git a/browser/components/asrouter/modules/OnboardingMessageProvider.sys.mjs b/browser/components/asrouter/modules/OnboardingMessageProvider.sys.mjs
--- a/browser/components/asrouter/modules/OnboardingMessageProvider.sys.mjs
+++ b/browser/components/asrouter/modules/OnboardingMessageProvider.sys.mjs
@@ -1406,11 +1406,11 @@
   },
 ];
 
 const PREONBOARDING_MESSAGES = () => [
   {
-    id: "ON_TRAIN_ROLLOUT",
+    id: "NEW_USER_TOU_ONBOARDING",
     enabled: true,
     requireAction: true,
     currentPolicyVersion: 3,
     minimumPolicyVersion: 3,
     firstRunURL: "https://www.mozilla.org/privacy/firefox/",
diff --git a/browser/components/preferences/preferences.js b/browser/components/preferences/preferences.js
--- a/browser/components/preferences/preferences.js
+++ b/browser/components/preferences/preferences.js
@@ -199,12 +199,14 @@
 
   if (Services.prefs.getBoolPref("browser.translations.newSettingsUI.enable")) {
     register_module("paneTranslations", gTranslationsPane);
   }
   if (Services.prefs.getBoolPref("browser.preferences.experimental")) {
-    // Set hidden based on previous load's hidden value.
+    // Set hidden based on previous load's hidden value or if Nimbus is
+    // disabled.
     document.getElementById("category-experimental").hidden =
+      !ExperimentAPI._manager.studiesEnabled ||
       Services.prefs.getBoolPref(
         "browser.preferences.experimental.hidden",
         false
       );
     register_module("paneExperimental", gExperimentalPane);
diff --git a/browser/components/tests/browser/browser_browserGlue_showModal_trigger.js b/browser/components/tests/browser/browser_browserGlue_showModal_trigger.js
--- a/browser/components/tests/browser/browser_browserGlue_showModal_trigger.js
+++ b/browser/components/tests/browser/browser_browserGlue_showModal_trigger.js
@@ -53,15 +53,15 @@
     ["browser.preonboarding.minimumPolicyVersion", 900],
     ["browser.preonboarding.currentPolicyVersion", 900],
     ["browser.startup.homepage_override.mstone", ""],
     ["startup.homepage_welcome_url", "about:welcome"],
     ["toolkit.telemetry.log.level", "trace"],
+    [TelemetryUtils.Preferences.BypassNotification, false],
   ];
   const PREFS_TO_CLEAR = [
     [TelemetryUtils.Preferences.AcceptedPolicyDate],
     [TelemetryUtils.Preferences.AcceptedPolicyVersion],
-    [TelemetryUtils.Preferences.BypassNotification],
   ];
   await SpecialPowers.pushPrefEnv({
     set: PREFS_TO_SET,
     clear: PREFS_TO_CLEAR,
   });
diff --git a/browser/components/urlbar/ActionsProviderTabGroups.sys.mjs b/browser/components/urlbar/ActionsProviderTabGroups.sys.mjs
--- a/browser/components/urlbar/ActionsProviderTabGroups.sys.mjs
+++ b/browser/components/urlbar/ActionsProviderTabGroups.sys.mjs
@@ -47,11 +47,11 @@
     let input = queryContext.trimmedLowerCaseSearchString;
     let results = [];
     let i = 0;
 
     for (let group of window.gBrowser.getAllTabGroups()) {
-      if (group.label.toLowerCase().startsWith(input)) {
+      if (this.#matches(group.label, input)) {
         results.push(
           this.#makeResult({
             key: `tabgroup-${i++}`,
             l10nId: "urlbar-result-action-switch-to-tabgroup",
             l10nArgs: { group: group.label },
@@ -63,11 +63,11 @@
         );
       }
     }
 
     for (let savedGroup of lazy.SessionStore.getSavedTabGroups()) {
-      if (savedGroup.name.toLowerCase().startsWith(input)) {
+      if (this.#matches(savedGroup.name, input)) {
         results.push(
           this.#makeResult({
             key: `tabgroup-${i++}`,
             l10nId: "urlbar-result-action-open-saved-tabgroup",
             l10nArgs: { group: savedGroup.name },
@@ -88,10 +88,18 @@
     }
 
     return results;
   }
 
+  #matches(groupName, trimmedLowerCaseSearchString) {
+    groupName = groupName.toLowerCase();
+    if (trimmedLowerCaseSearchString.length == 1) {
+      return groupName.startsWith(trimmedLowerCaseSearchString);
+    }
+    return groupName.includes(trimmedLowerCaseSearchString);
+  }
+
   #makeResult({ key, l10nId, l10nArgs, onPick, color }) {
     return new ActionsResult({
       key,
       l10nId,
       l10nArgs,
diff --git a/browser/components/urlbar/tests/browser/browser_action_tabgroups.js b/browser/components/urlbar/tests/browser/browser_action_tabgroups.js
--- a/browser/components/urlbar/tests/browser/browser_action_tabgroups.js
+++ b/browser/components/urlbar/tests/browser/browser_action_tabgroups.js
@@ -18,11 +18,11 @@
   const win = await BrowserTestUtils.openNewBrowserWindow();
   let aboutRobotsTab = BrowserTestUtils.addTab(win.gBrowser, "about:robots");
   let aboutMozillaTab = BrowserTestUtils.addTab(win.gBrowser, "about:mozilla");
   let tabGroup = win.gBrowser.addTabGroup([aboutRobotsTab, aboutMozillaTab], {
     color: "blue",
-    label: "about pages",
+    label: "my about pages",
   });
   tabGroup.collapsed = true;
 
   await UrlbarTestUtils.promiseAutocompleteResultPopup({
     window: win,
diff --git a/browser/config/version.txt b/browser/config/version.txt
--- a/browser/config/version.txt
+++ b/browser/config/version.txt
@@ -1 +1 @@
-140.0a1
+139.0
diff --git a/browser/config/version_display.txt b/browser/config/version_display.txt
--- a/browser/config/version_display.txt
+++ b/browser/config/version_display.txt
@@ -1 +1 @@
-140.0a1
+139.0b4
diff --git a/browser/locales/l10n-changesets.json b/browser/locales/l10n-changesets.json
--- a/browser/locales/l10n-changesets.json
+++ b/browser/locales/l10n-changesets.json
@@ -15,11 +15,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "af": {
         "pin": false,
         "platforms": [
             "linux",
@@ -35,11 +35,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "an": {
         "pin": false,
         "platforms": [
             "linux",
@@ -55,11 +55,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ar": {
         "pin": false,
         "platforms": [
             "linux",
@@ -75,11 +75,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ast": {
         "pin": false,
         "platforms": [
             "linux",
@@ -95,11 +95,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "az": {
         "pin": false,
         "platforms": [
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@@ -115,11 +115,11 @@
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@@ -135,11 +135,11 @@
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@@ -155,11 +155,11 @@
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@@ -175,11 +175,11 @@
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@@ -195,11 +195,11 @@
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@@ -215,11 +215,11 @@
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@@ -235,11 +235,11 @@
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@@ -255,11 +255,11 @@
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@@ -275,11 +275,11 @@
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@@ -295,11 +295,11 @@
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@@ -315,11 +315,11 @@
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@@ -335,11 +335,11 @@
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@@ -355,11 +355,11 @@
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@@ -375,11 +375,11 @@
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@@ -395,11 +395,11 @@
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@@ -415,11 +415,11 @@
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@@ -435,11 +435,11 @@
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@@ -455,11 +455,11 @@
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@@ -475,11 +475,11 @@
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@@ -495,11 +495,11 @@
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@@ -515,11 +515,11 @@
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@@ -535,11 +535,11 @@
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@@ -555,11 +555,11 @@
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@@ -575,11 +575,11 @@
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@@ -595,11 +595,11 @@
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@@ -615,11 +615,11 @@
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@@ -635,11 +635,11 @@
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@@ -655,11 +655,11 @@
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@@ -675,11 +675,11 @@
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@@ -695,11 +695,11 @@
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@@ -715,11 +715,11 @@
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@@ -735,11 +735,11 @@
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@@ -755,11 +755,11 @@
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@@ -775,11 +775,11 @@
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@@ -795,11 +795,11 @@
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@@ -815,11 +815,11 @@
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@@ -835,11 +835,11 @@
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@@ -855,11 +855,11 @@
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@@ -875,11 +875,11 @@
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@@ -895,11 +895,11 @@
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@@ -915,11 +915,11 @@
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@@ -935,11 +935,11 @@
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@@ -955,11 +955,11 @@
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@@ -975,11 +975,11 @@
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@@ -995,11 +995,11 @@
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@@ -1013,19 +1013,19 @@
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@@ -1041,11 +1041,11 @@
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@@ -1061,11 +1061,11 @@
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@@ -1081,11 +1081,11 @@
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@@ -1101,11 +1101,11 @@
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@@ -1121,11 +1121,11 @@
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@@ -1141,11 +1141,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "lij": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1161,11 +1161,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "lt": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1181,11 +1181,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "lv": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1201,11 +1201,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "mk": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1221,11 +1221,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "mr": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1241,11 +1241,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ms": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1261,11 +1261,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "my": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1281,11 +1281,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "nb-NO": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1301,11 +1301,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ne-NP": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1321,11 +1321,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "nl": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1341,11 +1341,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "nn-NO": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1361,11 +1361,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "oc": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1381,11 +1381,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "pa-IN": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1401,11 +1401,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "pl": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1421,11 +1421,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "pt-BR": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1441,11 +1441,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "pt-PT": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1461,11 +1461,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "rm": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1481,11 +1481,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ro": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1501,11 +1501,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ru": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1521,11 +1521,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sat": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1541,11 +1541,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sc": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1561,11 +1561,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sco": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1581,11 +1581,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "si": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1601,11 +1601,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sk": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1621,11 +1621,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "skr": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1641,11 +1641,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sl": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1661,11 +1661,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "son": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1681,11 +1681,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sq": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1701,11 +1701,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sr": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1721,11 +1721,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sv-SE": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1741,11 +1741,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "szl": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1761,11 +1761,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ta": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1781,11 +1781,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "te": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1801,11 +1801,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "tg": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1821,11 +1821,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "th": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1841,11 +1841,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "tl": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1861,11 +1861,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "tr": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1881,11 +1881,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "trs": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1901,11 +1901,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "uk": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1921,11 +1921,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ur": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1941,11 +1941,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "uz": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1961,11 +1961,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "vi": {
         "pin": false,
         "platforms": [
             "linux",
@@ -1981,11 +1981,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "xh": {
         "pin": false,
         "platforms": [
             "linux",
@@ -2001,11 +2001,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "zh-CN": {
         "pin": false,
         "platforms": [
             "linux",
@@ -2021,11 +2021,11 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "zh-TW": {
         "pin": false,
         "platforms": [
             "linux",
@@ -2041,8 +2041,8 @@
             "win64",
             "win64-aarch64",
             "win64-aarch64-devedition",
             "win64-devedition"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     }
 }
\ No newline at end of file
diff --git a/browser/themes/shared/places/sidebar.css b/browser/themes/shared/places/sidebar.css
--- a/browser/themes/shared/places/sidebar.css
+++ b/browser/themes/shared/places/sidebar.css
@@ -1,12 +1,16 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+@import url("chrome://browser/skin/browser-colors.css");
+
 .sidebar-panel {
   appearance: none;
+  /* Background color comes from the embedder */
   background-color: transparent;
+  color: var(--sidebar-text-color);
 }
 
 #sidebar-panel-header {
   justify-content: space-between;
   padding-inline: var(--space-large);
diff --git a/config/milestone.txt b/config/milestone.txt
--- a/config/milestone.txt
+++ b/config/milestone.txt
@@ -8,6 +8,6 @@
 # Referenced by build/moz.configure/init.configure.
 # Hopefully I'll be able to automate replacement of *all*
 # hardcoded milestones in the tree from these two files.
 #--------------------------------------------------------
 
-140.0a1
+139.0
diff --git a/dom/media/webrtc/libwebrtcglue/VideoStreamFactory.cpp b/dom/media/webrtc/libwebrtcglue/VideoStreamFactory.cpp
--- a/dom/media/webrtc/libwebrtcglue/VideoStreamFactory.cpp
+++ b/dom/media/webrtc/libwebrtcglue/VideoStreamFactory.cpp
@@ -234,15 +234,15 @@
 
     video_stream.bitrate_priority = aConfig.bitrate_priority;
     video_stream.max_qp = kQpMax;
 
     if (streamCount > 1) {
+      video_stream.num_temporal_layers = 2;
       if (mCodecConfig.mName == "H264") {
 #ifdef ANDROID
         video_stream.num_temporal_layers = 1;
 #else
-        video_stream.num_temporal_layers = 2;
         if (!HaveGMPFor("encode-video"_ns, {"moz-h264-temporal-svc"_ns})) {
           video_stream.num_temporal_layers = 1;
         }
 #endif
       }
diff --git a/mobile/android/android-components/components/feature/downloads/src/main/java/mozilla/components/feature/downloads/AbstractFetchDownloadService.kt b/mobile/android/android-components/components/feature/downloads/src/main/java/mozilla/components/feature/downloads/AbstractFetchDownloadService.kt
--- a/mobile/android/android-components/components/feature/downloads/src/main/java/mozilla/components/feature/downloads/AbstractFetchDownloadService.kt
+++ b/mobile/android/android-components/components/feature/downloads/src/main/java/mozilla/components/feature/downloads/AbstractFetchDownloadService.kt
@@ -729,15 +729,10 @@
         }
     }
 
     @Suppress("ComplexCondition", "ComplexMethod")
     internal fun performDownload(currentDownloadJobState: DownloadJobState, useHttpClient: Boolean = false) {
-        if (currentDownloadJobState.currentBytesCopied == currentDownloadJobState.state.contentLength) {
-            verifyDownload(currentDownloadJobState)
-            return
-        }
-
         val download = currentDownloadJobState.state
         val isResumingDownload = currentDownloadJobState.currentBytesCopied > 0L
         val headers = MutableHeaders()
 
         if (isResumingDownload) {
diff --git a/mobile/android/android-components/components/feature/downloads/src/test/java/mozilla/components/feature/downloads/AbstractFetchDownloadServiceTest.kt b/mobile/android/android-components/components/feature/downloads/src/test/java/mozilla/components/feature/downloads/AbstractFetchDownloadServiceTest.kt
--- a/mobile/android/android-components/components/feature/downloads/src/test/java/mozilla/components/feature/downloads/AbstractFetchDownloadServiceTest.kt
+++ b/mobile/android/android-components/components/feature/downloads/src/test/java/mozilla/components/feature/downloads/AbstractFetchDownloadServiceTest.kt
@@ -1402,21 +1402,10 @@
 
         verify(responseFromClient, atLeastOnce()).status
         verifyNoInteractions(responseFromDownloadState)
     }
 
-    @Test
-    fun `performDownload - don't make a client request when download is completed`() {
-        val responseFromDownloadState = mock<Response>()
-        val download = spy(DownloadState("https://example.com/file.txt", "file.txt", response = responseFromDownloadState, contentLength = 1000))
-        val downloadJob = DownloadJobState(currentBytesCopied = 1000, state = download, status = DOWNLOADING)
-
-        service.performDownload(downloadJob)
-
-        verify(service).verifyDownload(downloadJob)
-    }
-
     @Test
     @Config(sdk = [28])
     fun `onDestroy cancels all running jobs when using legacy file stream`() = runBlocking {
         val download = DownloadState("https://example.com/file.txt", "file.txt")
         val response = Response(
diff --git a/mobile/android/android-components/plugins/dependencies/src/main/java/ApplicationServices.kt b/mobile/android/android-components/plugins/dependencies/src/main/java/ApplicationServices.kt
--- a/mobile/android/android-components/plugins/dependencies/src/main/java/ApplicationServices.kt
+++ b/mobile/android/android-components/plugins/dependencies/src/main/java/ApplicationServices.kt
@@ -1,12 +1,12 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 // These lines are generated by android-components/automation/application-services-nightly-bump.py
-val VERSION = "140.20250428152438"
-val CHANNEL = ApplicationServicesChannel.NIGHTLY
+val VERSION = "139.0"
+val CHANNEL = ApplicationServicesChannel.RELEASE
 
 object ApplicationServicesConfig {
     val version = VERSION
     val channel = CHANNEL
     val groupId = when (channel) {
diff --git a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/setup/ui/SetupChecklistViewHolder.kt b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/setup/ui/SetupChecklistViewHolder.kt
--- a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/setup/ui/SetupChecklistViewHolder.kt
+++ b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/setup/ui/SetupChecklistViewHolder.kt
@@ -10,10 +10,11 @@
 import androidx.lifecycle.LifecycleOwner
 import mozilla.components.lib.state.ext.observeAsComposableState
 import org.mozilla.fenix.components.components
 import org.mozilla.fenix.compose.ComposeViewHolder
 import org.mozilla.fenix.home.sessioncontrol.SetupChecklistInteractor
+import org.mozilla.fenix.utils.isLargeScreenSize
 
 /**
  * View holder for the Setup Checklist feature.
  *
  * @param composeView [ComposeView] which will be populated with Jetpack Compose UI content.
@@ -30,11 +31,11 @@
     override fun Content() {
         val appStore = components.appStore
         val setupChecklistState =
             appStore.observeAsComposableState { state -> state.setupChecklistState }.value
 
-        if (setupChecklistState != null && setupChecklistState.isVisible) {
+        if (!composeView.context.isLargeScreenSize() && setupChecklistState != null && setupChecklistState.isVisible) {
             SetupChecklist(
                 setupChecklistState = setupChecklistState,
                 interactor = interactor,
             )
         }
diff --git a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/ui/Homepage.kt b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/ui/Homepage.kt
--- a/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/ui/Homepage.kt
+++ b/mobile/android/fenix/app/src/main/java/org/mozilla/fenix/home/ui/Homepage.kt
@@ -23,10 +23,11 @@
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.dimensionResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.tooling.preview.PreviewLightDark
 import androidx.compose.ui.unit.Dp
@@ -35,10 +36,11 @@
 import mozilla.telemetry.glean.private.NoExtras
 import org.mozilla.fenix.GleanMetrics.History
 import org.mozilla.fenix.GleanMetrics.HomeBookmarks
 import org.mozilla.fenix.GleanMetrics.RecentlyVisitedHomepage
 import org.mozilla.fenix.R
+import org.mozilla.fenix.components.appstate.setup.checklist.SetupChecklistState
 import org.mozilla.fenix.compose.MessageCard
 import org.mozilla.fenix.compose.home.HomeSectionHeader
 import org.mozilla.fenix.home.bookmarks.Bookmark
 import org.mozilla.fenix.home.bookmarks.interactor.BookmarksInteractor
 import org.mozilla.fenix.home.bookmarks.view.Bookmarks
@@ -69,10 +71,11 @@
 import org.mozilla.fenix.home.store.NimbusMessageState
 import org.mozilla.fenix.home.topsites.TopSiteColors
 import org.mozilla.fenix.home.topsites.TopSites
 import org.mozilla.fenix.theme.FirefoxTheme
 import org.mozilla.fenix.theme.Theme
+import org.mozilla.fenix.utils.isLargeScreenSize
 import org.mozilla.fenix.wallpapers.WallpaperState
 
 private const val MIDDLE_SEARCH_SCROLL_THRESHOLD_PX = 10
 
 /**
@@ -154,16 +157,11 @@
                         ) {
                             SearchBar(onClick = interactor::onNavigateSearch)
                         }
                     }
 
-                    if (setupChecklistState != null && setupChecklistState.isVisible) {
-                        SetupChecklist(
-                            setupChecklistState = setupChecklistState,
-                            interactor = interactor,
-                        )
-                    }
+                    MaybeAddSetupChecklist(setupChecklistState, interactor)
 
                     if (showRecentTabs) {
                         RecentTabsSection(
                             interactor = interactor,
                             cardBackgroundColor = cardBackgroundColor,
@@ -232,10 +230,24 @@
             }
         }
     }
 }
 
+@Composable
+private fun MaybeAddSetupChecklist(
+    setupChecklistState: SetupChecklistState?,
+    interactor: HomepageInteractor,
+) {
+    val isTabletDevice = LocalContext.current.isLargeScreenSize()
+    if (!isTabletDevice && setupChecklistState != null && setupChecklistState.isVisible) {
+        SetupChecklist(
+            setupChecklistState = setupChecklistState,
+            interactor = interactor,
+        )
+    }
+}
+
 @Composable
 private fun NimbusMessageCardSection(
     nimbusMessage: NimbusMessageState,
     interactor: MessageCardInteractor,
 ) {
diff --git a/mobile/android/fenix/app/src/main/res/values-et/strings.xml b/mobile/android/fenix/app/src/main/res/values-et/strings.xml
--- a/mobile/android/fenix/app/src/main/res/values-et/strings.xml
+++ b/mobile/android/fenix/app/src/main/res/values-et/strings.xml
@@ -822,12 +822,10 @@
   <string name="download_share_url">Jaga URL-i</string>
   <!-- Text for the button to share the download file -->
   <string name="download_share_file">Jaga faili</string>
   <!-- Alert dialog confirmation before deleting multiple download items, this is the positive action. -->
   <string name="download_delete_multi_select_dialog_confirm">Kustuta</string>
-  <!-- Alert dialog confirmation before deleting multiple download items, this is the negative action. -->
-  <string name="download_delete_multi_select_dialog_cancel">Loobu</string>
   <!-- Text for the header that groups the downloads the past 7 days -->
   <string name="download_time_period_last_7_days">Viimased 7 päeva</string>
   <!-- Text for the header that groups the downloads the past 30 days -->
   <string name="download_time_period_last_30_days">Viimased 30 päeva</string>
   <!-- Text for the header that groups the downloads older than other groups -->
@@ -842,50 +840,10 @@
   <string name="download_content_type_filter_image">Pildid</string>
   <!-- Text for the filter button to show only documents in the downloads list -->
   <string name="download_content_type_filter_document">Dokumendid</string>
   <!-- Text for the filter button to show all other file types in the downloads list -->
   <string name="download_content_type_filter_other_1">Muud</string>
-  <!--
-    WebCompat Reporter
-
-    The title of the Web Compat Reporter feature. This is displayed in the top app bar.
-  -->
-  <string name="webcompat_reporter_screen_title">Katkisest saidist teavitamine</string>
-  <!-- The description of the Web Compat Reporter feature. %1$s is the name of the app (for example "Firefox"). -->
-  <string name="webcompat_reporter_description">Aita muuta %1$s kõigi jaoks paremaks. Mozilla töötajad kasutavad sinu saadetud teavet veebisaidi probleemide lahendamiseks.</string>
-  <!-- The text field label of the URL text field. This is displayed above the user-inputted URL. -->
-  <string name="webcompat_reporter_label_url">URL</string>
-  <!-- The error message of the URL text field when an invalid URL has been entered. -->
-  <string name="webcompat_reporter_url_error_invalid">Palun sisesta korrektne URL</string>
-  <!-- The label/title of a field in the Web Compat Reporter feature for explaining a high-level reason why the site is broken. -->
-  <string name="webcompat_reporter_label_whats_broken_2">Mis on katki?</string>
-  <!-- The placeholder text for the dropdown where a user selects a high-level reason why the site is broken. -->
-  <string name="webcompat_reporter_choose_reason">Vali põhjus</string>
-  <!-- The error message of the dropdown, prompting the user to select a high-level reason why the site is broken. -->
-  <string name="webcompat_reporter_choose_reason_error">Palun vali põhjus</string>
-  <!-- The label/title of an optional field in the Web Compat Reporter feature for adding additional information. -->
-  <string name="webcompat_reporter_label_description">Kirjelda probleemi (valikuline)</string>
-  <!-- The button text for navigating away from the feature to provide more information on the broken site's bug report. -->
-  <string name="webcompat_reporter_send_more_info">Saada lisateavet</string>
-  <!-- The button text for the cancel button to leave the Web Compat Reporter feature. -->
-  <string name="webcompat_reporter_cancel">Loobu</string>
-  <!-- The button text for the send button to submit the provided form data. -->
-  <string name="webcompat_reporter_send">Saada</string>
-  <!-- Text for a snackbar to confirm the successful submission of a WebCompat report. -->
-  <string name="webcompat_reporter_success_snackbar_text">Raport on saadetud</string>
-  <!-- Button text for closing or dismissing the snackbar shown after successfully submitting a WebCompat report. -->
-  <string name="webcompat_reporter_dismiss_success_snackbar_text">Sulge</string>
-  <!--
-    These reason strings are dropdown options on a WebCompat reporter form, indicating what is broken on the site.
-
-    Broken site reason text for site slow or not working
-  -->
-  <string name="webcompat_reporter_reason_slow">Sait on aeglane või ei tööta</string>
-  <!-- Broken site reason text for images or videos -->
-  <string name="webcompat_reporter_reason_media">Pildid või videod</string>
-  <!-- Broken site reason text for buttons, links, and other content -->
-  <string name="webcompat_reporter_reason_content">Nupud, lingid ja muu sisu</string>
   <!--
     Crashes
 
     Title text displayed on the tab crash page. %1$s is the name of the app (for example "Firefox").
   -->
diff --git a/mobile/android/fenix/app/src/main/res/values-sq/strings.xml b/mobile/android/fenix/app/src/main/res/values-sq/strings.xml
--- a/mobile/android/fenix/app/src/main/res/values-sq/strings.xml
+++ b/mobile/android/fenix/app/src/main/res/values-sq/strings.xml
@@ -1526,12 +1526,10 @@
   <string name="download_item_status_failed" tools:ignore="UnusedResources">Shkarkimi dështoi</string>
   <!-- Placeholder text to indicate that users can use the search bar to search for a download. -->
   <string name="download_search_placeholder">Kërko te shkarkimet</string>
   <!-- Text to indicate that no downloads match the search query. -->
   <string name="download_search_no_results_found">S’u gjetën përfundime</string>
-  <!-- Text for the "Select all" button, which selects all downloaded items in the downloads list. -->
-  <string name="download_select_all_items">Përzgjidhe krejt</string>
   <!--
     Downloads Content Type Filters
 
     Text for the filter button to show all files in the downloads list
   -->
diff --git a/mobile/android/version.txt b/mobile/android/version.txt
--- a/mobile/android/version.txt
+++ b/mobile/android/version.txt
@@ -1 +1 @@
-140.0a1
+139.0b4
diff --git a/mobile/locales/l10n-changesets.json b/mobile/locales/l10n-changesets.json
--- a/mobile/locales/l10n-changesets.json
+++ b/mobile/locales/l10n-changesets.json
@@ -4,881 +4,881 @@
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "an": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ar": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ast": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "az": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "be": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "bg": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "bn": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "br": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "bs": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ca": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "cak": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "cs": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "cy": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "da": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "de": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "dsb": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "el": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "en-CA": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "en-GB": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "eo": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "es-AR": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "es-CL": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "es-ES": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "es-MX": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "et": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "eu": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "fa": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ff": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "fi": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "fr": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "fy-NL": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ga-IE": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "gd": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "gl": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "gn": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "gu-IN": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "he": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "hi-IN": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "hr": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "hsb": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "hu": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "hy-AM": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ia": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "id": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "is": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "it": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ja": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ka": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "kab": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "kk": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "km": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "kn": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ko": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "lij": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "lo": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "lt": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ltg": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "lv": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "meh": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "mix": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ml": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "mr": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ms": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "my": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "nb-NO": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ne-NP": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "nl": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "nn-NO": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "oc": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "pa-IN": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "pl": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "pt-BR": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "pt-PT": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "rm": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ro": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ru": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sk": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sl": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "son": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sq": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sr": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "sv-SE": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ta": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "te": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "th": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "tl": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "tr": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "trs": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "uk": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "ur": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "uz": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "vi": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "wo": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "xh": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "zam": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "zh-CN": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     },
     "zh-TW": {
         "pin": false,
         "platforms": [
             "android",
             "android-arm",
             "android-multilocale"
         ],
-        "revision": "45008f6e14773d249097b9551fb431ba39d10f05"
+        "revision": "76dee154a6243ffb650688eb2b3227cc3967699c"
     }
 }
\ No newline at end of file
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -3750,15 +3750,19 @@
 
 #ifdef MOZ_DATA_REPORTING
   pref("datareporting.policy.dataSubmissionEnabled", true);
   pref("datareporting.policy.dataSubmissionPolicyNotifiedTime", "0");
   pref("datareporting.policy.dataSubmissionPolicyAcceptedVersion", 0);
-  pref("datareporting.policy.dataSubmissionPolicyBypassNotification", false);
   pref("datareporting.policy.currentPolicyVersion", 2);
   pref("datareporting.policy.minimumPolicyVersion", 1);
   pref("datareporting.policy.minimumPolicyVersion.channel-beta", 2);
   pref("datareporting.policy.firstRunURL", "https://www.mozilla.org/privacy/firefox/");
+  #ifdef MOZILLA_OFFICIAL
+    pref("datareporting.policy.dataSubmissionPolicyBypassNotification", false);
+  #else
+    pref("datareporting.policy.dataSubmissionPolicyBypassNotification", true);
+  #endif
 #endif
 
 #ifdef MOZ_SERVICES_HEALTHREPORT
   #if !defined(ANDROID)
     pref("datareporting.healthreport.infoURL", "https://www.mozilla.org/legal/privacy/firefox.html#health-report");
diff --git a/security/nss/lib/nss/nss.h b/security/nss/lib/nss/nss.h
--- a/security/nss/lib/nss/nss.h
+++ b/security/nss/lib/nss/nss.h
@@ -20,16 +20,16 @@
  * this is a beta release.
  *
  * The format of the version string should be
  *     "<major version>.<minor version>[.<patch level>[.<build number>]][ <ECC>][ <Beta>]"
  */
-#define NSS_VERSION "3.111" _NSS_CUSTOMIZED " Beta"
+#define NSS_VERSION "3.111" _NSS_CUSTOMIZED
 #define NSS_VMAJOR 3
 #define NSS_VMINOR 111
 #define NSS_VPATCH 0
 #define NSS_VBUILD 0
-#define NSS_BETA PR_TRUE
+#define NSS_BETA PR_FALSE
 
 #ifndef RC_INVOKED
 
 #include "seccomon.h"
 
diff --git a/security/nss/lib/softoken/softkver.h b/security/nss/lib/softoken/softkver.h
--- a/security/nss/lib/softoken/softkver.h
+++ b/security/nss/lib/softoken/softkver.h
@@ -15,13 +15,13 @@
  * and whether this is a beta release.
  *
  * The format of the version string should be
  *     "<major version>.<minor version>[.<patch level>[.<build number>]][ <ECC>][ <Beta>]"
  */
-#define SOFTOKEN_VERSION "3.111" SOFTOKEN_ECC_STRING " Beta"
+#define SOFTOKEN_VERSION "3.111" SOFTOKEN_ECC_STRING
 #define SOFTOKEN_VMAJOR 3
 #define SOFTOKEN_VMINOR 111
 #define SOFTOKEN_VPATCH 0
 #define SOFTOKEN_VBUILD 0
-#define SOFTOKEN_BETA PR_TRUE
+#define SOFTOKEN_BETA PR_FALSE
 
 #endif /* _SOFTKVER_H_ */
diff --git a/security/nss/lib/util/nssutil.h b/security/nss/lib/util/nssutil.h
--- a/security/nss/lib/util/nssutil.h
+++ b/security/nss/lib/util/nssutil.h
@@ -17,16 +17,16 @@
  * and whether this is a beta release.
  *
  * The format of the version string should be
  *     "<major version>.<minor version>[.<patch level>[.<build number>]][ <Beta>]"
  */
-#define NSSUTIL_VERSION "3.111 Beta"
+#define NSSUTIL_VERSION "3.111"
 #define NSSUTIL_VMAJOR 3
 #define NSSUTIL_VMINOR 111
 #define NSSUTIL_VPATCH 0
 #define NSSUTIL_VBUILD 0
-#define NSSUTIL_BETA PR_TRUE
+#define NSSUTIL_BETA PR_FALSE
 
 SEC_BEGIN_PROTOS
 
 /*
  * Returns a const string of the UTIL library version.
diff --git a/taskcluster/config.yml b/taskcluster/config.yml
--- a/taskcluster/config.yml
+++ b/taskcluster/config.yml
@@ -809,10 +809,29 @@
         tree-dev:
             provisioner: scriptworker-k8s
             implementation: treescript
             os: linux
             worker-type: '{trust-domain}-1-tree-dev'
+        lando:
+            provisioner: scriptworker-k8s
+            implementation: landoscript
+            os: linux
+            worker-type:
+                by-project:
+                    # Autoland is treated specially here because any landoscript
+                    # tasks that run on it must be done on level 3 workers
+                    # (so they can actually push changes). On other projects
+                    # `release-level` would handle this just fine, but
+                    # `autoland` is considered a "staging" release level for
+                    # historical reasons.
+                    # https://bugzilla.mozilla.org/show_bug.cgi?id=1960918
+                    # seeks to improve this situation.
+                    autoland: '{trust-domain}-3-lando'
+                    default:
+                        by-release-level:
+                            production: '{trust-domain}-3-lando'
+                            staging: '{trust-domain}-1-lando'
         t-bitbar-gw.*:
             provisioner: proj-autophone
             implementation: generic-worker
             os: linux-bitbar
             worker-type: 'gecko-{alias}'
diff --git a/taskcluster/gecko_taskgraph/transforms/release_version_bump.py b/taskcluster/gecko_taskgraph/transforms/resolve_landoscript_keyed_by.py
rename from taskcluster/gecko_taskgraph/transforms/release_version_bump.py
rename to taskcluster/gecko_taskgraph/transforms/resolve_landoscript_keyed_by.py
--- a/taskcluster/gecko_taskgraph/transforms/release_version_bump.py
+++ b/taskcluster/gecko_taskgraph/transforms/resolve_landoscript_keyed_by.py
@@ -13,19 +13,22 @@
 
 @transforms.add
 def handle_keyed_by(config, tasks):
     """Resolve fields that can be keyed by platform, etc."""
     default_fields = [
+        "scopes",
         "worker.push",
         "worker.bump-files",
         "worker-type",
     ]
     for task in tasks:
         fields = default_fields[:]
         for additional_field in (
             "l10n-bump-info",
             "source-repo",
+            "lando-repo",
+            "hg-repo-url",
             "dontbuild",
             "ignore-closed-tree",
         ):
             if additional_field in task["worker"]:
                 fields.append(f"worker.{additional_field}")
diff --git a/taskcluster/gecko_taskgraph/transforms/task.py b/taskcluster/gecko_taskgraph/transforms/task.py
--- a/taskcluster/gecko_taskgraph/transforms/task.py
+++ b/taskcluster/gecko_taskgraph/transforms/task.py
@@ -1526,10 +1526,148 @@
 
     if worker.get("ssh-user"):
         task_def["payload"]["ssh_user"] = worker["ssh-user"]
 
 
+@payload_builder(
+    "landoscript",
+    schema={
+        Required("lando-repo"): str,
+        Optional("hg-repo-url"): str,
+        Optional("ignore-closed-tree"): bool,
+        Optional("dontbuild"): bool,
+        Optional("tags"): [Any("buildN", "release", None)],
+        Optional("android-l10n-import-info"): {
+            Required("from-repo-url"): str,
+            Required("toml-info"): [
+                {
+                    Required("toml-path"): str,
+                    Required("dest-path"): str,
+                }
+            ],
+        },
+        Optional("android-l10n-sync-info"): {
+            Required("from-branch"): str,
+            Required("toml-info"): [
+                {
+                    Required("toml-path"): str,
+                }
+            ],
+        },
+        Optional("l10n-bump-info"): [
+            {
+                Required("name"): str,
+                Required("path"): str,
+                Optional("l10n-repo-url"): str,
+                Optional("l10n-repo-target-branch"): str,
+                Optional("ignore-config"): object,
+                Required("platform-configs"): [
+                    {
+                        Required("platforms"): [str],
+                        Required("path"): str,
+                        Optional("format"): str,
+                    }
+                ],
+            }
+        ],
+        Optional("bump-files"): [str],
+    },
+)
+def build_landoscript_payload(config, task, task_def):
+    worker = task["worker"]
+    release_config = get_release_config(config)
+    task_def["payload"] = {"actions": [], "lando_repo": worker["lando-repo"]}
+    actions = task_def["payload"]["actions"]
+
+    if worker.get("ignore-closed-tree") is not None:
+        task_def["payload"]["ignore_closed_tree"] = worker["ignore-closed-tree"]
+
+    if worker.get("dontbuild"):
+        task_def["payload"]["dontbuild"] = True
+
+    if worker.get("android-l10n-import-info"):
+        android_l10n_import_info = {}
+        for k, v in worker["android-l10n-import-info"].items():
+            android_l10n_import_info[k.replace("-", "_")] = worker[
+                "android-l10n-import-info"
+            ][k]
+        android_l10n_import_info["toml_info"] = [
+            {
+                param_name.replace("-", "_"): param_value
+                for param_name, param_value in entry.items()
+            }
+            for entry in worker["android-l10n-import-info"]["toml-info"]
+        ]
+        task_def["payload"]["android_l10n_import_info"] = android_l10n_import_info
+        actions.append("android_l10n_import")
+
+    if worker.get("android-l10n-sync-info"):
+        android_l10n_sync_info = {}
+        for k, v in worker["android-l10n-sync-info"].items():
+            android_l10n_sync_info[k.replace("-", "_")] = worker[
+                "android-l10n-sync-info"
+            ][k]
+        android_l10n_sync_info["toml_info"] = [
+            {
+                param_name.replace("-", "_"): param_value
+                for param_name, param_value in entry.items()
+            }
+            for entry in worker["android-l10n-sync-info"]["toml-info"]
+        ]
+        task_def["payload"]["android_l10n_sync_info"] = android_l10n_sync_info
+        actions.append("android_l10n_sync")
+
+    if worker.get("l10n-bump-info"):
+        l10n_bump_info = []
+        l10n_repo_urls = set()
+        for lbi in worker["l10n-bump-info"]:
+            new_lbi = {}
+            if "l10n-repo-url" in lbi:
+                l10n_repo_urls.add(lbi["l10n-repo-url"])
+            for k, v in lbi.items():
+                new_lbi[k.replace("-", "_")] = lbi[k]
+            l10n_bump_info.append(new_lbi)
+
+        task_def["payload"]["l10n_bump_info"] = l10n_bump_info
+        if len(l10n_repo_urls) > 1:
+            raise Exception(
+                "Must use the same l10n-repo-url for all files in the same task!"
+            )
+        elif len(l10n_repo_urls) == 1:
+            actions.append("l10n_bump")
+
+    if worker.get("tags"):
+        tag_names = []
+        product = task["shipping-product"].upper()
+        version = release_config["version"].replace(".", "_")
+        buildnum = release_config["build_number"]
+        if "buildN" in worker["tags"]:
+            tag_names.extend(
+                [
+                    f"{product}_{version}_BUILD{buildnum}",
+                ]
+            )
+        if "release" in worker["tags"]:
+            tag_names.extend([f"{product}_{version}_RELEASE"])
+        tag_info = {
+            "tags": tag_names,
+            "hg_repo_url": worker["hg-repo-url"],
+            "revision": config.params[
+                "{}head_rev".format(worker.get("repo-param-prefix", ""))
+            ],
+        }
+        task_def["payload"]["tag_info"] = tag_info
+        actions.append("tag")
+
+    if worker.get("bump-files"):
+        bump_info = {}
+        bump_info["next_version"] = release_config["next_version"]
+        bump_info["files"] = worker["bump-files"]
+        task_def["payload"]["version_bump_info"] = bump_info
+        actions.append("version_bump")
+
+
 @payload_builder(
     "invalid",
     schema={
         # an invalid task is one which should never actually be created; this is used in
         # release automation on branches where the task just doesn't make sense
diff --git a/taskcluster/kinds/android-l10n/kind.yml b/taskcluster/kinds/android-l10n/kind.yml
--- a/taskcluster/kinds/android-l10n/kind.yml
+++ b/taskcluster/kinds/android-l10n/kind.yml
@@ -3,35 +3,42 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 ---
 loader: taskgraph.loader.transform:loader
 
 transforms:
+    - gecko_taskgraph.transforms.resolve_landoscript_keyed_by:transforms
     - gecko_taskgraph.transforms.task:transforms
 
 task-defaults:
     run-on-projects: []
     treeherder:
         kind: build
         platform: fenix-android-all/opt
         tier: 1
-    worker-type: tree
+    worker-type: lando
     worker:
-        implementation: treescript
-        tags: []
-        bump: false
-        dontbuild: false
-        push: true
+        implementation: landoscript
 
 tasks:
     import:
         name: android_l10n_import
         description: Import strings from android-l10n repo
         treeherder:
             symbol: android-l10n(I)
+        scopes:
+            by-project:
+                try:
+                    - project:releng:lando:repo:ff-test-dev
+                    - project:releng:lando:action:android_l10n_import
+                default:
+                    - project:releng:lando:repo:firefox-autoland
+                    - project:releng:lando:action:android_l10n_import
         worker:
-            ignore-closed-tree: true
-            source-repo: https://hg.mozilla.org/integration/autoland
+            lando-repo:
+                by-project:
+                    try: ff-test-dev
+                    default: firefox-autoland
             android-l10n-import-info:
                 from-repo-url: https://github.com/mozilla-l10n/android-l10n
                 toml-info:
                     - toml-path: mozilla-mobile/fenix/l10n.toml
                       dest-path: mobile/android/fenix
@@ -40,17 +47,28 @@
                     - toml-path: mozilla-mobile/android-components/l10n.toml
                       dest-path: mobile/android/android-components
 
     sync:
         name: android_l10n_sync
-        description: Sync android-l10n strings from central to beta
+        description: Sync android-l10n strings from main to beta
         treeherder:
             symbol: android-l10n(S)
+        scopes:
+            by-project:
+                try:
+                    - project:releng:lando:repo:ff-test-dev
+                    - project:releng:lando:action:android_l10n_sync
+                default:
+                    - project:releng:lando:repo:firefox-beta
+                    - project:releng:lando:action:android_l10n_sync
         worker:
-            ignore-closed-tree: false
-            source-repo: https://hg.mozilla.org/releases/mozilla-beta
+            lando-repo:
+                by-project:
+                    try: ff-test-dev
+                    default: firefox-beta
+            ignore-closed-tree: true
             android-l10n-sync-info:
-                from-repo-url: https://hg.mozilla.org/mozilla-central
+                from-branch: main
                 toml-info:
                     - toml-path: mobile/android/fenix/l10n.toml
                     - toml-path: mobile/android/focus-android/l10n.toml
                     - toml-path: mobile/android/android-components/l10n.toml
diff --git a/taskcluster/kinds/l10n-bump/kind.yml b/taskcluster/kinds/l10n-bump/kind.yml
--- a/taskcluster/kinds/l10n-bump/kind.yml
+++ b/taskcluster/kinds/l10n-bump/kind.yml
@@ -3,45 +3,66 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 ---
 loader: taskgraph.loader.transform:loader
 
 transforms:
-    - gecko_taskgraph.transforms.release_version_bump:transforms
+    - gecko_taskgraph.transforms.resolve_landoscript_keyed_by:transforms
     - gecko_taskgraph.transforms.task:transforms
 
 task-defaults:
-    worker-type: tree
+    worker-type: lando
+    scopes:
+        by-project:
+            mozilla-beta:
+                - project:releng:lando:repo:firefox-beta
+                - project:releng:lando:action:l10n_bump
+            mozilla-central:
+                - project:releng:lando:repo:firefox-main
+                - project:releng:lando:action:l10n_bump
+            autoland:
+                - project:releng:lando:repo:firefox-autoland
+                - project:releng:lando:action:l10n_bump
+            mozilla-release:
+                - project:releng:lando:repo:firefox-release
+                - project:releng:lando:action:l10n_bump
+            mozilla-esr128:
+                - project:releng:lando:repo:firefox-esr128
+                - project:releng:lando:action:l10n_bump
+            try:
+                - project:releng:lando:repo:ff-test-dev
+                - project:releng:lando:action:l10n_bump
+            # set a default to avoid failing tgdiff tests on other branches
+            # even though this doesn't run there
+            default: []
     worker:
-        implementation: treescript
-        tags: []
-        bump: false
+        implementation: landoscript
         dontbuild:
             by-project:
                 mozilla-beta: false
                 default: true
         ignore-closed-tree:
             by-project:
-                autoland: true
-                default: false
-        push:
+                mozilla-beta: false
+                default: true
+        lando-repo:
             by-project:
-                mozilla-(central|beta): true
-                autoland: true
-                default: false
-        source-repo:
-            by-release-type:
-                beta: https://hg.mozilla.org/releases/mozilla-beta
-                nightly: https://hg.mozilla.org/mozilla-central
-                default: https://hg.mozilla.org/integration/autoland
+                mozilla-central: main
+                mozilla-beta: firefox-beta
+                mozilla-release: firefox-release
+                mozilla-esr128: firefox-esr128
+                autoland: firefox-autoland
+                try: ff-test-dev
+                # set a default to avoid failing tgdiff tests on other branches
+                # even though this doesn't run there
+                default: ''
         l10n-bump-info:
             by-release-type:
                 # XXX whenever the `beta` config changes, make sure to make
                 #     the corresponding change in merge-automation/kind.yml
                 beta:
                     - name: Firefox l10n changesets
                       path: browser/locales/l10n-changesets.json
-                      version-path: browser/config/version.txt
                       l10n-repo-url: https://github.com/mozilla-l10n/firefox-l10n
                       l10n-repo-target-branch: main
                       ignore-config:
                           ja:
                               - macosx64
@@ -84,11 +105,10 @@
                           ]
                     - name: Mobile l10n changesets
                       path: mobile/locales/l10n-changesets.json
                       l10n-repo-url: https://github.com/mozilla-l10n/firefox-l10n
                       l10n-repo-target-branch: main
-                      version-path: mobile/android/version.txt
                       platform-configs:
                           [
                               {
                                   "platforms":
                                       [
@@ -102,11 +122,10 @@
                 default:
                     - name: Firefox l10n changesets
                       path: browser/locales/l10n-changesets.json
                       l10n-repo-url: https://github.com/mozilla-l10n/firefox-l10n
                       l10n-repo-target-branch: main
-                      version-path: browser/config/version.txt
                       ignore-config:
                           ja:
                               - macosx64
                               - macosx64-devedition
                           ja-JP-mac:
@@ -147,11 +166,10 @@
                           ]
                     - name: Mobile l10n changesets
                       path: mobile/locales/l10n-changesets.json
                       l10n-repo-url: https://github.com/mozilla-l10n/firefox-l10n
                       l10n-repo-target-branch: main
-                      version-path: mobile/android/version.txt
                       platform-configs:
                           [
                               {
                                   "platforms":
                                       [
diff --git a/taskcluster/kinds/release-early-tagging/kind.yml b/taskcluster/kinds/release-early-tagging/kind.yml
--- a/taskcluster/kinds/release-early-tagging/kind.yml
+++ b/taskcluster/kinds/release-early-tagging/kind.yml
@@ -1,32 +1,57 @@
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 ---
 loader: taskgraph.loader.transform:loader
 
 transforms:
     - gecko_taskgraph.transforms.release_deps:transforms
-    - gecko_taskgraph.transforms.release_version_bump:transforms
+    - gecko_taskgraph.transforms.resolve_landoscript_keyed_by:transforms
     - gecko_taskgraph.transforms.task:transforms
 
 task-defaults:
     description: Release Promotion version tag for buildN
     run-on-projects: []
     shipping-phase: promote
-    worker-type: tree
+    worker-type: lando
+    scopes:
+        by-project:
+            mozilla-beta:
+                - project:releng:lando:repo:firefox-beta
+                - project:releng:lando:action:tag
+            mozilla-release:
+                - project:releng:lando:repo:firefox-release
+                - project:releng:lando:action:tag
+            mozilla-esr115:
+                - project:releng:lando:repo:firefox-esr115
+                - project:releng:lando:action:tag
+            mozilla-esr128:
+                - project:releng:lando:repo:firefox-esr128
+                - project:releng:lando:action:tag
+            try:
+                - project:releng:lando:repo:ff-test-dev
+                - project:releng:lando:action:tag
+            default: []
     worker:
-        implementation: treescript
+        implementation: landoscript
         tags: ['buildN']
-        bump: false
-        dontbuild: true
-        push:
+        lando-repo:
             by-project:
-                mozilla-(beta|release|esr.*): true
-                maple: true
-                default: false
-
+                mozilla-beta: firefox-beta
+                mozilla-release: firefox-release
+                mozilla-esr115: firefox-esr115
+                mozilla-esr128: firefox-esr128
+                try: ff-test-dev
+                default: ""
+        # used to map hg revisions to the git revisions that landoscript needs
+        hg-repo-url:
+            by-project:
+                mozilla-beta: https://hg.mozilla.org/releases/mozilla-beta
+                mozilla-release: https://hg.mozilla.org/releases/mozilla-release
+                mozilla-esr115: https://hg.mozilla.org/releases/mozilla-esr115
+                mozilla-esr128: https://hg.mozilla.org/releases/mozilla-esr128
+                try: https://hg.mozilla.org/try
+                default: ""
 
 tasks:
     firefox:
         name: firefox-tag-buildN
         shipping-product: firefox
diff --git a/taskcluster/kinds/release-version-bump/kind.yml b/taskcluster/kinds/release-version-bump/kind.yml
--- a/taskcluster/kinds/release-version-bump/kind.yml
+++ b/taskcluster/kinds/release-version-bump/kind.yml
@@ -4,11 +4,11 @@
 ---
 loader: taskgraph.loader.transform:loader
 
 transforms:
     - gecko_taskgraph.transforms.release_deps:transforms
-    - gecko_taskgraph.transforms.release_version_bump:transforms
+    - gecko_taskgraph.transforms.resolve_landoscript_keyed_by:transforms
     - gecko_taskgraph.transforms.task:transforms
 
 kind-dependencies:
     - release-beetmover-push-to-release
     - post-beetmover-components-dummy
@@ -16,16 +16,54 @@
 
 task-defaults:
     description: Release Promotion version bump/tag
     run-on-projects: []
     shipping-phase: ship
-    worker-type: tree
+    worker-type: lando
+    scopes:
+        by-project:
+            mozilla-beta:
+                - project:releng:lando:repo:firefox-beta
+                - project:releng:lando:action:tag
+                - project:releng:lando:action:version_bump
+            mozilla-release:
+                - project:releng:lando:repo:firefox-release
+                - project:releng:lando:action:tag
+                - project:releng:lando:action:version_bump
+            mozilla-esr115:
+                - project:releng:lando:repo:firefox-esr115
+                - project:releng:lando:action:tag
+                - project:releng:lando:action:version_bump
+            mozilla-esr128:
+                - project:releng:lando:repo:firefox-esr128
+                - project:releng:lando:action:tag
+                - project:releng:lando:action:version_bump
+            try:
+                - project:releng:lando:repo:ff-test-dev
+                - project:releng:lando:action:tag
+                - project:releng:lando:action:version_bump
+            default: []
     worker:
-        implementation: treescript
-        dontbuild: true
+        implementation: landoscript
         tags: ['release']
-        bump: true
+        lando-repo:
+            by-project:
+                mozilla-beta: firefox-beta
+                mozilla-release: firefox-release
+                mozilla-esr115: firefox-esr115
+                mozilla-esr128: firefox-esr128
+                try: ff-test-dev
+                default: ""
+        # used to map hg revisions to the git revisions that landoscript needs
+        hg-repo-url:
+            by-project:
+                mozilla-beta: https://hg.mozilla.org/releases/mozilla-beta
+                mozilla-release: https://hg.mozilla.org/releases/mozilla-release
+                mozilla-esr115: https://hg.mozilla.org/releases/mozilla-esr115
+                mozilla-esr128: https://hg.mozilla.org/releases/mozilla-esr128
+                try: https://hg.mozilla.org/try
+                default: ""
         # We're bumping both desktop and mobile version regardless of which product is getting
         # released, to avoid confusion from them getting out of sync.
         bump-files:
             by-release-type:
                 default:
@@ -38,15 +76,10 @@
                     - "mobile/android/version.txt"
                 esr.*:
                     - "browser/config/version.txt"
                     - "browser/config/version_display.txt"
                     - "config/milestone.txt"
-        push:
-            by-project:
-                mozilla-(beta|release|esr.*): true
-                maple: true
-                default: false
 
 tasks:
     firefox:
         name: firefox-version-bump
         shipping-product: firefox
diff --git a/toolkit/components/extensions/test/browser/browser_ext_themes_sidebars.js b/toolkit/components/extensions/test/browser/browser_ext_themes_sidebars.js
--- a/toolkit/components/extensions/test/browser/browser_ext_themes_sidebars.js
+++ b/toolkit/components/extensions/test/browser/browser_ext_themes_sidebars.js
@@ -124,18 +124,17 @@
     is(
       sidebarBoxCS.color,
       actualColor,
       "Sidebar box text color should be set."
     );
+    is(
+      rootCS.backgroundColor,
+      actualBackground,
+      "Sidebar background should be set."
+    );
+    is(rootCS.color, actualColor, "Sidebar text color should be set.");
   }
-
-  is(
-    rootCS.backgroundColor,
-    actualBackground,
-    "Sidebar background should be set."
-  );
-  is(rootCS.color, actualColor, "Sidebar text color should be set.");
   is(
     highlightCS.backgroundColor,
     actualHighlightBackground,
     "Sidebar highlight background color should be set."
   );
diff --git a/toolkit/components/nimbus/FeatureManifest.yaml b/toolkit/components/nimbus/FeatureManifest.yaml
--- a/toolkit/components/nimbus/FeatureManifest.yaml
+++ b/toolkit/components/nimbus/FeatureManifest.yaml
@@ -767,16 +767,10 @@
     firstRunURL:
       type: string
       fallbackPref: datareporting.policy.firstRunURL
       description: >-
         URL of browser tab to be opened on first run instead of infobar.
-    onTrainRolloutPopulation:
-      type: int
-      fallbackPref: browser.preonboarding.onTrainRolloutPopulation
-      description: >-
-        If an on-train limited rollout is enabled, the percentage of the population to enroll
-
 
 moreFromMozilla:
   description: "New page on about:preferences to suggest more Mozilla products"
   owner: omc@mozilla.com
   hasExposure: true
diff --git a/toolkit/components/pdfjs/content/build/pdf.mjs b/toolkit/components/pdfjs/content/build/pdf.mjs
--- a/toolkit/components/pdfjs/content/build/pdf.mjs
+++ b/toolkit/components/pdfjs/content/build/pdf.mjs
@@ -10084,11 +10084,11 @@
     worker = workerParams.port ? PDFWorker.fromPort(workerParams) : new PDFWorker(workerParams);
     task._worker = worker;
   }
   const docParams = {
     docId,
-    apiVersion: "5.2.135",
+    apiVersion: "5.2.96",
     data,
     password,
     disableAutoFetch,
     rangeChunkSize,
     length,
@@ -11719,12 +11719,12 @@
         this.callback();
       }
     }
   }
 }
-const version = "5.2.135";
-const build = "b47b248e1";
+const version = "5.2.96";
+const build = "d8d3e0abf";
 
 ;// ./src/shared/scripting_utils.js
 function makeColorComp(n) {
   return Math.floor(Math.max(0, Math.min(1, n)) * 255).toString(16).padStart(2, "0");
 }
@@ -21100,12 +21100,12 @@
 
 
 
 
 
-const pdfjsVersion = "5.2.135";
-const pdfjsBuild = "b47b248e1";
+const pdfjsVersion = "5.2.96";
+const pdfjsBuild = "d8d3e0abf";
 globalThis.pdfjsLib = {
   AbortException: AbortException,
   AnnotationEditorLayer: AnnotationEditorLayer,
   AnnotationEditorParamsType: AnnotationEditorParamsType,
   AnnotationEditorType: AnnotationEditorType,
diff --git a/toolkit/components/pdfjs/content/build/pdf.scripting.mjs b/toolkit/components/pdfjs/content/build/pdf.scripting.mjs
--- a/toolkit/components/pdfjs/content/build/pdf.scripting.mjs
+++ b/toolkit/components/pdfjs/content/build/pdf.scripting.mjs
@@ -4041,10 +4041,10 @@
   };
 }
 
 ;// ./src/pdf.scripting.js
 
-const pdfjsVersion = "5.2.135";
-const pdfjsBuild = "b47b248e1";
+const pdfjsVersion = "5.2.96";
+const pdfjsBuild = "d8d3e0abf";
 globalThis.pdfjsScripting = {
   initSandbox: initSandbox
 };
diff --git a/toolkit/components/pdfjs/content/build/pdf.worker.mjs b/toolkit/components/pdfjs/content/build/pdf.worker.mjs
--- a/toolkit/components/pdfjs/content/build/pdf.worker.mjs
+++ b/toolkit/components/pdfjs/content/build/pdf.worker.mjs
@@ -57146,11 +57146,11 @@
     const verbosity = getVerbosityLevel();
     const {
       docId,
       apiVersion
     } = docParams;
-    const workerVersion = "5.2.135";
+    const workerVersion = "5.2.96";
     if (apiVersion !== workerVersion) {
       throw new Error(`The API version "${apiVersion}" does not match ` + `the Worker version "${workerVersion}".`);
     }
     const workerHandlerName = docId + "_worker";
     let handler = new MessageHandler(workerHandlerName, docId, port);
@@ -57671,12 +57671,12 @@
   }
 }
 
 ;// ./src/pdf.worker.js
 
-const pdfjsVersion = "5.2.135";
-const pdfjsBuild = "b47b248e1";
+const pdfjsVersion = "5.2.96";
+const pdfjsBuild = "d8d3e0abf";
 globalThis.pdfjsWorker = {
   WorkerMessageHandler: WorkerMessageHandler
 };
 
 export { WorkerMessageHandler };
diff --git a/toolkit/components/pdfjs/content/web/viewer-geckoview.mjs b/toolkit/components/pdfjs/content/web/viewer-geckoview.mjs
--- a/toolkit/components/pdfjs/content/web/viewer-geckoview.mjs
+++ b/toolkit/components/pdfjs/content/web/viewer-geckoview.mjs
@@ -7002,11 +7002,11 @@
   #scaleTimeoutId = null;
   #signatureManager = null;
   #supportsPinchToZoom = true;
   #textLayerMode = TextLayerMode.ENABLE;
   constructor(options) {
-    const viewerVersion = "5.2.135";
+    const viewerVersion = "5.2.96";
     if (version !== viewerVersion) {
       throw new Error(`The API version "${version}" does not match the Viewer version "${viewerVersion}".`);
     }
     this.container = options.container;
     this.viewer = options.viewer || options.container.firstElementChild;
@@ -10546,12 +10546,12 @@
 ;// ./web/viewer-geckoview.js
 
 
 
 
-const pdfjsVersion = "5.2.135";
-const pdfjsBuild = "b47b248e1";
+const pdfjsVersion = "5.2.96";
+const pdfjsBuild = "d8d3e0abf";
 const AppConstants = null;
 window.PDFViewerApplication = PDFViewerApplication;
 window.PDFViewerApplicationConstants = AppConstants;
 window.PDFViewerApplicationOptions = AppOptions;
 function getViewerConfiguration() {
diff --git a/toolkit/components/pdfjs/content/web/viewer.mjs b/toolkit/components/pdfjs/content/web/viewer.mjs
--- a/toolkit/components/pdfjs/content/web/viewer.mjs
+++ b/toolkit/components/pdfjs/content/web/viewer.mjs
@@ -10190,11 +10190,11 @@
   #scaleTimeoutId = null;
   #signatureManager = null;
   #supportsPinchToZoom = true;
   #textLayerMode = TextLayerMode.ENABLE;
   constructor(options) {
-    const viewerVersion = "5.2.135";
+    const viewerVersion = "5.2.96";
     if (version !== viewerVersion) {
       throw new Error(`The API version "${version}" does not match the Viewer version "${viewerVersion}".`);
     }
     this.container = options.container;
     this.viewer = options.viewer || options.container.firstElementChild;
@@ -15186,12 +15186,12 @@
 ;// ./web/viewer.js
 
 
 
 
-const pdfjsVersion = "5.2.135";
-const pdfjsBuild = "b47b248e1";
+const pdfjsVersion = "5.2.96";
+const pdfjsBuild = "d8d3e0abf";
 const AppConstants = null;
 window.PDFViewerApplication = PDFViewerApplication;
 window.PDFViewerApplicationConstants = AppConstants;
 window.PDFViewerApplicationOptions = AppOptions;
 function getViewerConfiguration() {
diff --git a/toolkit/components/places/nsFaviconService.cpp b/toolkit/components/places/nsFaviconService.cpp
--- a/toolkit/components/places/nsFaviconService.cpp
+++ b/toolkit/components/places/nsFaviconService.cpp
@@ -470,10 +470,11 @@
   RefPtr<AsyncGetFaviconForPageRunnable> runnable =
       new AsyncGetFaviconForPageRunnable(pageURI, aPreferredWidth, promise);
   RefPtr<Database> DB = Database::GetDatabase();
   if (MOZ_UNLIKELY(!DB)) {
     promise->Reject(NS_ERROR_UNEXPECTED, __func__);
+    return promise;
   }
 
   nsresult rv = DB->DispatchToAsyncThread(runnable);
   if (NS_FAILED(rv)) {
     promise->Reject(rv, __func__);
diff --git a/toolkit/components/telemetry/app/TelemetryReportingPolicy.sys.mjs b/toolkit/components/telemetry/app/TelemetryReportingPolicy.sys.mjs
--- a/toolkit/components/telemetry/app/TelemetryReportingPolicy.sys.mjs
+++ b/toolkit/components/telemetry/app/TelemetryReportingPolicy.sys.mjs
@@ -11,11 +11,10 @@
 
 const lazy = {};
 
 ChromeUtils.defineESModuleGetters(lazy, {
   BrowserUtils: "resource://gre/modules/BrowserUtils.sys.mjs",
-  ExperimentManager: "resource://nimbus/lib/ExperimentManager.sys.mjs",
   TelemetrySend: "resource://gre/modules/TelemetrySend.sys.mjs",
   NimbusFeatures: "resource://nimbus/ExperimentAPI.sys.mjs",
   OnboardingMessageProvider:
     "resource:///modules/asrouter/OnboardingMessageProvider.sys.mjs",
   WinTaskbarJumpList: "resource:///modules/WindowsJumpLists.sys.mjs",
@@ -719,77 +718,35 @@
       // Glean can now init on shutdown if necessary.
       Services.prefs.setBoolPref("telemetry.fog.init_on_shutdown", true);
     });
   },
 
-  async _configureFromOnTrainRollout() {
-    const ENROLLMENT_PREF = "browser.preonboarding.enrolledInOnTrainRollout";
-
-    const platformSupported =
-      AppConstants.platform == "linux" ||
-      AppConstants.platform == "macosx" ||
-      (AppConstants.platform === "win" &&
-        Services.sysinfo.getProperty("hasWinPackageId", false));
-    if (!platformSupported) {
-      return;
-    }
-
-    let enrolled;
-    // Only enroll new users
-    if (this.isFirstRun()) {
-      const count = this._nimbusVariables.onTrainRolloutPopulation;
-      if (!count) {
-        this._log.trace(
-          `_configureFromOnTrainRollout: User not enrolled in on-train rollout - population is 0, not setting preferences`
-        );
-        return;
-      }
-      const bucketConfig = {
-        count,
-        namespace: "firefox-desktop-preonboarding-on-train-rollout-1",
-        randomizationUnit: "normandy_id",
-        start: 0,
-        total: 10000,
-      };
-
-      enrolled =
-        await lazy.ExperimentManager.isInBucketAllocation(bucketConfig);
-
-      if (enrolled) {
-        Services.prefs.setBoolPref(ENROLLMENT_PREF, enrolled);
-      }
-    } else {
-      enrolled = Services.prefs.getBoolPref(ENROLLMENT_PREF, false);
-    }
-
-    if (enrolled) {
-      const preonboardingMessage =
-        lazy.OnboardingMessageProvider.getPreonboardingMessages().find(
-          m => m.id === "ON_TRAIN_ROLLOUT"
-        );
-
-      this._nimbusVariables = preonboardingMessage;
-
-      this._log.trace(
-        `_configureFromOnTrainRollout: User enrolled in on-train rollout, will set preferences`
-      );
-    } else {
-      this._log.trace(
-        `_configureFromOnTrainRollout: User not enrolled in on-train rollout, not setting preferences`
-      );
-    }
-  },
-
   /**
    * Capture Nimbus configuration: record feature variables for future use and
    * set Gecko preferences based on values.
    */
   async _configureFromNimbus() {
     this._nimbusVariables = lazy.NimbusFeatures.preonboarding.getAllVariables();
 
     if (this._nimbusVariables.enabled === null) {
-      await this._configureFromOnTrainRollout();
+      const preonboardingMessage =
+        lazy.OnboardingMessageProvider.getPreonboardingMessages().find(
+          m => m.id === "NEW_USER_TOU_ONBOARDING"
+        );
+      // Use default message variables, overriding with values from any set
+      // fallback prefs.
+      this._nimbusVariables = {
+        ...preonboardingMessage,
+        ...Object.fromEntries(
+          Object.entries(this._nimbusVariables).filter(
+            ([_, value]) => value !== null
+          )
+        ),
+      };
+      this._log.trace(
+        `_configureFromNimbus: using default preonboarding message`
+      );
     }
 
     if (this._nimbusVariables.enabled) {
       if ("currentPolicyVersion" in this._nimbusVariables) {
         this._log.trace(
diff --git a/toolkit/components/telemetry/tests/unit/test_TelemetryReportingPolicy.js b/toolkit/components/telemetry/tests/unit/test_TelemetryReportingPolicy.js
--- a/toolkit/components/telemetry/tests/unit/test_TelemetryReportingPolicy.js
+++ b/toolkit/components/telemetry/tests/unit/test_TelemetryReportingPolicy.js
@@ -6,11 +6,10 @@
 
 "use strict";
 
 ChromeUtils.defineESModuleGetters(this, {
   AppConstants: "resource://gre/modules/AppConstants.sys.mjs",
-  ClientEnvironment: "resource://normandy/lib/ClientEnvironment.sys.mjs",
   ExperimentAPI: "resource://nimbus/ExperimentAPI.sys.mjs",
   ExperimentFakes: "resource://testing-common/NimbusTestUtils.sys.mjs",
   ExperimentManager: "resource://nimbus/lib/ExperimentManager.sys.mjs",
   NimbusFeatures: "resource://nimbus/ExperimentAPI.sys.mjs",
   UpdateUtils: "resource://gre/modules/UpdateUtils.sys.mjs",
@@ -31,34 +30,10 @@
 const TEST_CHANNEL = "TestChannelABC";
 
 const PREF_MINIMUM_CHANNEL_POLICY_VERSION =
   TelemetryUtils.Preferences.MinimumPolicyVersion + ".channel-" + TEST_CHANNEL;
 
-const ON_TRAIN_ROLLOUT_SUPPORTED_PLATFORM =
-  AppConstants.platform == "linux" ||
-  AppConstants.platform == "macosx" ||
-  (AppConstants.platform === "win" &&
-    Services.sysinfo.getProperty("hasWinPackageId", false));
-
-const ON_TRAIN_ROLLOUT_POPULATION_PREF =
-  "browser.preonboarding.onTrainRolloutPopulation";
-
-const ON_TRAIN_ROLLOUT_ENROLLMENT_PREF =
-  "browser.preonboarding.enrolledInOnTrainRollout";
-
-const ON_TRAIN_TEST_RECIPE = {
-  slug: "new-onboarding-experience-on-train-rollout-phase-1",
-  bucketConfig: {
-    count: 100,
-    namespace: "firefox-desktop-preonboarding-on-train-rollout-1",
-    randomizationUnit: "normandy_id",
-    start: 0,
-    total: 10000,
-  },
-  branches: [{ slug: "treatment", ratio: 100 }],
-};
-
 function fakeShowPolicyTimeout(set, clear) {
   Policy.setShowInfobarTimeout = set;
   Policy.clearShowInfobarTimeout = clear;
 }
 
@@ -167,10 +142,14 @@
 
   const FIRST_RUN_TIMEOUT_MSEC = 60 * 1000; // 60s
   const OTHER_RUNS_TIMEOUT_MSEC = 10 * 1000; // 10s
 
   Services.prefs.clearUserPref(TelemetryUtils.Preferences.FirstRun);
+  // The new user TOS modal is now enabled by default, so the infobar will only
+  // show if preonboarding is explicitly turned off via nimbus variable or its
+  // fallback pref.
+  Services.prefs.setBoolPref("browser.preonboarding.enabled", false);
 
   let promiseTimeout = () =>
     new Promise(resolve => {
       fakeShowPolicyTimeout(
         (_callback, timeout) => resolve(timeout),
@@ -197,10 +176,12 @@
   Assert.equal(
     startupTimeout,
     OTHER_RUNS_TIMEOUT_MSEC,
     "The infobar display timeout should be 10s on other runs."
   );
+
+  Services.prefs.clearUserPref("browser.preonboarding.enabled");
 });
 
 add_task(async function test_prefs() {
   TelemetryReportingPolicy.reset();
 
@@ -707,93 +688,30 @@
       "After, the user has accepted the experiment/rollout version."
     );
   }
 );
 
-const getOnTrainRolloutModalStub = async ({
-  shouldEnroll,
-  isFirstRun,
-  isEnrolled,
-}) => {
-  Services.prefs.setIntPref(
-    ON_TRAIN_ROLLOUT_POPULATION_PREF,
-    ON_TRAIN_TEST_RECIPE.bucketConfig.count
-  );
-  Services.prefs.setBoolPref(ON_TRAIN_ROLLOUT_ENROLLMENT_PREF, isEnrolled);
-  Services.prefs.setBoolPref(TelemetryUtils.Preferences.FirstRun, isFirstRun);
-
-  const testIDs = await ExperimentManager.generateTestIds(ON_TRAIN_TEST_RECIPE);
-  let experimentId = shouldEnroll ? testIDs.treatment : testIDs.notInExperiment;
-  sinon.stub(ClientEnvironment, "userId").get(() => experimentId);
-  let modalStub = sinon.stub(Policy, "showModal").returns(true);
-
-  fakeResetAcceptedPolicy();
-  TelemetryReportingPolicy.reset();
-  let p = Policy.delayedSetup();
-  Policy.fakeSessionRestoreNotification();
-  fakeInteractWithModal();
-  await p;
-
-  const doCleanup = () => {
-    sinon.restore();
-    fakeResetAcceptedPolicy();
-    Services.prefs.clearUserPref(ON_TRAIN_ROLLOUT_POPULATION_PREF);
-    Services.prefs.clearUserPref(ON_TRAIN_ROLLOUT_ENROLLMENT_PREF);
-  };
-
-  return { modalStub, doCleanup };
-};
-
 add_task(
   skipIfNotBrowser(),
-  async function test_onTrainRollout_configuration_supportedOS_should_enroll() {
-    if (!ON_TRAIN_ROLLOUT_SUPPORTED_PLATFORM) {
-      info(
-        "Skipping supported OS test because current platform is not Linux, Mac, or Win MSIX"
-      );
-      return;
-    }
+  async function test_default_modal_shows_when_not_enrolled_in_experiment() {
+    let modalStub = sinon.stub(Policy, "showModal").returns(true);
 
-    const { modalStub, doCleanup } = await getOnTrainRolloutModalStub({
-      shouldEnroll: true,
-      isFirstRun: true,
-      isEnrolled: false,
-    });
+    fakeResetAcceptedPolicy();
+    TelemetryReportingPolicy.reset();
+    let p = Policy.delayedSetup();
+    Policy.fakeSessionRestoreNotification();
+    fakeInteractWithModal();
+    await p;
 
     Assert.equal(
       modalStub.callCount,
       1,
-      "showModal is invoked once if enrolled in rollout"
+      "showModal is invoked once when not enrolled in an experiemnt"
     );
 
-    doCleanup();
-  }
-);
-
-add_task(
-  skipIfNotBrowser(),
-  async function test_onTrainRollout_configuration_supportedOS_should_not_enroll() {
-    if (!ON_TRAIN_ROLLOUT_SUPPORTED_PLATFORM) {
-      info(
-        "Skipping supported OS test because current platform is not Linux, Mac, or Win MSIX"
-      );
-      return;
-    }
-
-    const { modalStub, doCleanup } = await getOnTrainRolloutModalStub({
-      shouldEnroll: false,
-      isFirstRun: true,
-      isEnrolled: false,
-    });
-
-    Assert.equal(
-      modalStub.callCount,
-      0,
-      "showModal is not invoked if not enrolled in rollout"
-    );
-
-    doCleanup();
+    sinon.restore();
+    fakeResetAcceptedPolicy();
   }
 );
 
 add_task(
   skipIfNotBrowser(),
@@ -825,92 +743,14 @@
     fakeInteractWithModal();
 
     await p;
 
     Assert.ok(
-      unblockSpy.calledOnce,
+      unblockSpy.callCount >= blockSpy.callCount,
       "Jump list should be unblocked after user interacts with modal"
     );
 
     doCleanup();
 
     sinon.restore();
   }
 );
-
-add_task(
-  skipIfNotBrowser(),
-  async function test_onTrainRollout_configuration_unsupportedOS() {
-    if (ON_TRAIN_ROLLOUT_SUPPORTED_PLATFORM) {
-      info(
-        "Skipping unsupported OS test because current platform is supported"
-      );
-      return;
-    }
-
-    const { modalStub, doCleanup } = await getOnTrainRolloutModalStub({
-      shouldEnroll: true,
-      isFirstRun: true,
-      isEnrolled: false,
-    });
-
-    Assert.equal(
-      modalStub.callCount,
-      0,
-      "showModal is not invoked on unsupported OS even if on-train rollouts are enabled and user would otherwise be enrolled"
-    );
-
-    doCleanup();
-  }
-);
-
-add_task(
-  skipIfNotBrowser(),
-  async function test_onTrainRollout_subsequent_startup_after_enrolled() {
-    if (!ON_TRAIN_ROLLOUT_SUPPORTED_PLATFORM) {
-      info(
-        "Skipping supported OS test because current platform is not Linux, Mac, or Win MSIX"
-      );
-      return;
-    }
-
-    const { modalStub, doCleanup } = await getOnTrainRolloutModalStub({
-      shouldEnroll: true,
-      isFirstRun: false,
-      isEnrolled: true,
-    });
-
-    Assert.equal(
-      modalStub.callCount,
-      1,
-      "showModal is invoked on subsequent startup if user was enrolled on first startup but did not interact with modal"
-    );
-
-    doCleanup();
-  }
-);
-
-add_task(
-  skipIfNotBrowser(),
-  async function test_onTrainRollout_subsequent_startup_not_enrolled() {
-    if (!ON_TRAIN_ROLLOUT_SUPPORTED_PLATFORM) {
-      info(
-        "Skipping supported OS test because current platform is not Linux, Mac, or Win MSIX"
-      );
-      return;
-    }
-
-    const { modalStub, doCleanup } = await getOnTrainRolloutModalStub({
-      shouldEnroll: true,
-      isFirstRun: false,
-      isEnrolled: false,
-    });
-
-    Assert.equal(
-      modalStub.callCount,
-      0,
-      "showModal is not invoked on subsequent startup if user was not enrolled on first startup"
-    );
-
-    doCleanup();
-  }
-);
diff --git a/toolkit/library/libxul.symbols b/toolkit/library/libxul.symbols
--- a/toolkit/library/libxul.symbols
+++ b/toolkit/library/libxul.symbols
@@ -5,6 +5,7 @@
 ChildProcessInit
 GeckoViewOpenWindow
 #endif
 #ifdef ANDROID
 *ffi*
+FT*
 #endif
diff --git a/toolkit/themes/shared/global-shared.css b/toolkit/themes/shared/global-shared.css
--- a/toolkit/themes/shared/global-shared.css
+++ b/toolkit/themes/shared/global-shared.css
@@ -389,24 +389,26 @@
   &:not([disabled]) {
     &:hover {
       color: var(--button-text-color-hover);
       background-color: var(--button-background-color-hover);
     }
-    &:hover:active {
+    &:hover:active,
+    &[open] {
       color: var(--button-text-color-active);
       background-color: var(--button-background-color-active);
     }
     &[default],
     &.primary {
       color: var(--button-text-color-primary);
       background-color: var(--color-accent-primary);
-
       &:hover {
         color: var(--button-text-color-primary-hover);
         background-color: var(--color-accent-primary-hover);
       }
-      &:hover:active {
+      &:hover:active,
+      &[open] {
+        color: var(--button-text-color-primary-active);
         background-color: var(--color-accent-primary-active);
       }
     }
   }