diff --git a/toolkit/components/pdfjs/content/build/pdf.js b/toolkit/components/pdfjs/content/build/pdf.js
--- a/toolkit/components/pdfjs/content/build/pdf.js
+++ b/toolkit/components/pdfjs/content/build/pdf.js
@@ -916,11 +916,11 @@
     task._worker = worker;
   }
   const docId = task.docId;
   const fetchDocParams = {
     docId,
-    apiVersion: '3.4.97',
+    apiVersion: '3.4.103',
     data,
     password,
     disableAutoFetch,
     rangeChunkSize,
     length,
@@ -2584,13 +2584,13 @@
         this.callback();
       }
     }
   }
 }
-const version = '3.4.97';
+const version = '3.4.103';
 exports.version = version;
-const build = '22618213c';
+const build = '13af3f344';
 exports.build = build;
 
 /***/ }),
 /* 3 */
 /***/ ((__unused_webpack_module, exports, __w_pdfjs_require__) => {
@@ -2661,10 +2661,15 @@
     return this.#storage.has(key);
   }
   getAll() {
     return this.#storage.size > 0 ? (0, _util.objectFromMap)(this.#storage) : null;
   }
+  setAll(obj) {
+    for (const [key, val] of Object.entries(obj)) {
+      this.setValue(key, val);
+    }
+  }
   get size() {
     return this.#storage.size;
   }
   #setModified() {
     if (!this.#modified) {
@@ -12999,13 +13004,13 @@
 var _tools = __w_pdfjs_require__(5);
 var _annotation_layer = __w_pdfjs_require__(26);
 var _worker_options = __w_pdfjs_require__(14);
 var _svg = __w_pdfjs_require__(29);
 var _xfa_layer = __w_pdfjs_require__(28);
-const pdfjsVersion = '3.4.97';
-const pdfjsBuild = '22618213c';
+const pdfjsVersion = '3.4.103';
+const pdfjsBuild = '13af3f344';
 })();
 
 /******/ 	return __webpack_exports__;
 /******/ })()
 ;
 });
\ No newline at end of file
diff --git a/toolkit/components/pdfjs/content/build/pdf.scripting.js b/toolkit/components/pdfjs/content/build/pdf.scripting.js
--- a/toolkit/components/pdfjs/content/build/pdf.scripting.js
+++ b/toolkit/components/pdfjs/content/build/pdf.scripting.js
@@ -4256,13 +4256,13 @@
   get: function () {
     return _initialization.initSandbox;
   }
 }));
 var _initialization = __w_pdfjs_require__(1);
-const pdfjsVersion = '3.4.97';
-const pdfjsBuild = '22618213c';
+const pdfjsVersion = '3.4.103';
+const pdfjsBuild = '13af3f344';
 })();
 
 /******/ 	return __webpack_exports__;
 /******/ })()
 ;
 });
\ No newline at end of file
diff --git a/toolkit/components/pdfjs/content/build/pdf.worker.js b/toolkit/components/pdfjs/content/build/pdf.worker.js
--- a/toolkit/components/pdfjs/content/build/pdf.worker.js
+++ b/toolkit/components/pdfjs/content/build/pdf.worker.js
@@ -99,11 +99,11 @@
     const verbosity = (0, _util.getVerbosityLevel)();
     const {
       docId,
       apiVersion
     } = docParams;
-    const workerVersion = '3.4.97';
+    const workerVersion = '3.4.103';
     if (apiVersion !== workerVersion) {
       throw new Error(`The API version "${apiVersion}" does not match ` + `the Worker version "${workerVersion}".`);
     }
     const workerHandlerName = docId + "_worker";
     let handler = new _message_handler.MessageHandler(workerHandlerName, docId, port);
@@ -52452,13 +52452,13 @@
   get: function () {
     return _worker.WorkerMessageHandler;
   }
 }));
 var _worker = __w_pdfjs_require__(1);
-const pdfjsVersion = '3.4.97';
-const pdfjsBuild = '22618213c';
+const pdfjsVersion = '3.4.103';
+const pdfjsBuild = '13af3f344';
 })();
 
 /******/ 	return __webpack_exports__;
 /******/ })()
 ;
 });
\ No newline at end of file
diff --git a/toolkit/components/pdfjs/content/web/viewer-geckoview.js b/toolkit/components/pdfjs/content/web/viewer-geckoview.js
--- a/toolkit/components/pdfjs/content/web/viewer-geckoview.js
+++ b/toolkit/components/pdfjs/content/web/viewer-geckoview.js
@@ -808,11 +808,10 @@
     pdfLinkService.setViewer(this.pdfViewer);
     pdfScriptingManager.setViewer(this.pdfViewer);
     if (appConfig.sidebar?.thumbnailView) {
       this.pdfThumbnailViewer = new _webPdf_thumbnail_viewer.PDFThumbnailViewer({
         container: appConfig.sidebar.thumbnailView,
-        eventBus,
         renderingQueue: pdfRenderingQueue,
         linkService: pdfLinkService,
         l10n: this.l10n,
         pageColors
       });
@@ -4248,11 +4247,12 @@
     normalizationRegex = withSyllablesRegExp;
   } else {
     const replace = Object.keys(CHARACTERS_TO_NORMALIZE).join("");
     const toNormalizeWithNFKC = "\u2460-\u2473" + "\u24b6-\u24ff" + "\u3244-\u32bf" + "\u32d0-\u32fe" + "\uff00-\uffef";
     const CJK = "(?:\\p{Ideographic}|[\u3040-\u30FF])";
-    const regexp = `([${replace}])|([${toNormalizeWithNFKC}])|(\\p{M}+(?:-\\n)?)|(\\S-\\n)|(${CJK}\\n)|(\\n)`;
+    const HKDiacritics = "(?:\u3099|\u309A)";
+    const regexp = `([${replace}])|([${toNormalizeWithNFKC}])|(${HKDiacritics}\\n)|(\\p{M}+(?:-\\n)?)|(\\S-\\n)|(${CJK}\\n)|(\\n)`;
     if (syllablePositions.length === 0) {
       normalizationRegex = noSyllablesRegExp = new RegExp(regexp + "|(\\u0000)", "gum");
     } else {
       normalizationRegex = withSyllablesRegExp = new RegExp(regexp + `|(${FIRST_CHAR_SYLLABLES_REG_EXP})`, "gum");
     }
@@ -4267,11 +4267,11 @@
   let syllableIndex = 0;
   let shift = 0;
   let shiftOrigin = 0;
   let eol = 0;
   let hasDiacritics = false;
-  normalized = normalized.replace(normalizationRegex, (match, p1, p2, p3, p4, p5, p6, p7, i) => {
+  normalized = normalized.replace(normalizationRegex, (match, p1, p2, p3, p4, p5, p6, p7, p8, i) => {
     i -= shiftOrigin;
     if (p1) {
       const replacement = CHARACTERS_TO_NORMALIZE[p1];
       const jj = replacement.length;
       for (let j = 1; j < jj; j++) {
@@ -4292,12 +4292,26 @@
       }
       shift -= jj - 1;
       return replacement;
     }
     if (p3) {
-      const hasTrailingDashEOL = p3.endsWith("\n");
-      const len = hasTrailingDashEOL ? p3.length - 2 : p3.length;
+      hasDiacritics = true;
+      if (i + eol === rawDiacriticsPositions[rawDiacriticsIndex]?.[1]) {
+        ++rawDiacriticsIndex;
+      } else {
+        positions.push([i - 1 - shift + 1, shift - 1]);
+        shift -= 1;
+        shiftOrigin += 1;
+      }
+      positions.push([i - shift + 1, shift]);
+      shiftOrigin += 1;
+      eol += 1;
+      return p3.charAt(0);
+    }
+    if (p4) {
+      const hasTrailingDashEOL = p4.endsWith("\n");
+      const len = hasTrailingDashEOL ? p4.length - 2 : p4.length;
       hasDiacritics = true;
       let jj = len;
       if (i + eol === rawDiacriticsPositions[rawDiacriticsIndex]?.[1]) {
         jj -= rawDiacriticsPositions[rawDiacriticsIndex][0];
         ++rawDiacriticsIndex;
@@ -4311,28 +4325,28 @@
         i += len - 1;
         positions.push([i - shift + 1, 1 + shift]);
         shift += 1;
         shiftOrigin += 1;
         eol += 1;
-        return p3.slice(0, len);
-      }
-      return p3;
-    }
-    if (p4) {
+        return p4.slice(0, len);
+      }
+      return p4;
+    }
+    if (p5) {
       positions.push([i - shift + 1, 1 + shift]);
       shift += 1;
       shiftOrigin += 1;
       eol += 1;
-      return p4.charAt(0);
-    }
-    if (p5) {
-      positions.push([i - shift + 1, shift]);
-      shiftOrigin += 1;
-      eol += 1;
       return p5.charAt(0);
     }
     if (p6) {
+      positions.push([i - shift + 1, shift]);
+      shiftOrigin += 1;
+      eol += 1;
+      return p6.charAt(0);
+    }
+    if (p7) {
       positions.push([i - shift + 1, shift - 1]);
       shift -= 1;
       shiftOrigin += 1;
       eol += 1;
       return " ";
@@ -4344,11 +4358,11 @@
         positions.push([i - (shift - j), shift - j]);
       }
       shift -= newCharLen;
       shiftOrigin += newCharLen;
     }
-    return p7;
+    return p8;
   });
   positions.push([normalized.length, shift]);
   return [normalized, positions, hasDiacritics];
 }
 function getOriginalIndex(diffs, pos, len) {
@@ -6004,11 +6018,11 @@
   #resizeObserver = new ResizeObserver(this.#resizeObserverCallback.bind(this));
   #scrollModePageState = null;
   #onVisibilityChange = null;
   #scaleTimeoutId = null;
   constructor(options) {
-    const viewerVersion = '3.4.97';
+    const viewerVersion = '3.4.103';
     if (_pdfjsLib.version !== viewerVersion) {
       throw new Error(`The API version "${_pdfjsLib.version}" does not match the Viewer version "${viewerVersion}".`);
     }
     this.container = options.container;
     this.viewer = options.viewer || options.container.firstElementChild;
@@ -9413,12 +9427,12 @@
 __webpack_require__(1);
 var _ui_utils = __webpack_require__(4);
 var _app_options = __webpack_require__(6);
 var _pdf_link_service = __webpack_require__(8);
 var _app = __webpack_require__(3);
-const pdfjsVersion = '3.4.97';
-const pdfjsBuild = '22618213c';
+const pdfjsVersion = '3.4.103';
+const pdfjsBuild = '13af3f344';
 const AppConstants = null;
 exports.PDFViewerApplicationConstants = AppConstants;
 window.PDFViewerApplication = _app.PDFViewerApplication;
 window.PDFViewerApplicationConstants = AppConstants;
 window.PDFViewerApplicationOptions = _app_options.AppOptions;
diff --git a/toolkit/components/pdfjs/content/web/viewer.js b/toolkit/components/pdfjs/content/web/viewer.js
--- a/toolkit/components/pdfjs/content/web/viewer.js
+++ b/toolkit/components/pdfjs/content/web/viewer.js
@@ -808,11 +808,10 @@
     pdfLinkService.setViewer(this.pdfViewer);
     pdfScriptingManager.setViewer(this.pdfViewer);
     if (appConfig.sidebar?.thumbnailView) {
       this.pdfThumbnailViewer = new _webPdf_thumbnail_viewer.PDFThumbnailViewer({
         container: appConfig.sidebar.thumbnailView,
-        eventBus,
         renderingQueue: pdfRenderingQueue,
         linkService: pdfLinkService,
         l10n: this.l10n,
         pageColors
       });
@@ -5181,11 +5180,12 @@
     normalizationRegex = withSyllablesRegExp;
   } else {
     const replace = Object.keys(CHARACTERS_TO_NORMALIZE).join("");
     const toNormalizeWithNFKC = "\u2460-\u2473" + "\u24b6-\u24ff" + "\u3244-\u32bf" + "\u32d0-\u32fe" + "\uff00-\uffef";
     const CJK = "(?:\\p{Ideographic}|[\u3040-\u30FF])";
-    const regexp = `([${replace}])|([${toNormalizeWithNFKC}])|(\\p{M}+(?:-\\n)?)|(\\S-\\n)|(${CJK}\\n)|(\\n)`;
+    const HKDiacritics = "(?:\u3099|\u309A)";
+    const regexp = `([${replace}])|([${toNormalizeWithNFKC}])|(${HKDiacritics}\\n)|(\\p{M}+(?:-\\n)?)|(\\S-\\n)|(${CJK}\\n)|(\\n)`;
     if (syllablePositions.length === 0) {
       normalizationRegex = noSyllablesRegExp = new RegExp(regexp + "|(\\u0000)", "gum");
     } else {
       normalizationRegex = withSyllablesRegExp = new RegExp(regexp + `|(${FIRST_CHAR_SYLLABLES_REG_EXP})`, "gum");
     }
@@ -5200,11 +5200,11 @@
   let syllableIndex = 0;
   let shift = 0;
   let shiftOrigin = 0;
   let eol = 0;
   let hasDiacritics = false;
-  normalized = normalized.replace(normalizationRegex, (match, p1, p2, p3, p4, p5, p6, p7, i) => {
+  normalized = normalized.replace(normalizationRegex, (match, p1, p2, p3, p4, p5, p6, p7, p8, i) => {
     i -= shiftOrigin;
     if (p1) {
       const replacement = CHARACTERS_TO_NORMALIZE[p1];
       const jj = replacement.length;
       for (let j = 1; j < jj; j++) {
@@ -5225,12 +5225,26 @@
       }
       shift -= jj - 1;
       return replacement;
     }
     if (p3) {
-      const hasTrailingDashEOL = p3.endsWith("\n");
-      const len = hasTrailingDashEOL ? p3.length - 2 : p3.length;
+      hasDiacritics = true;
+      if (i + eol === rawDiacriticsPositions[rawDiacriticsIndex]?.[1]) {
+        ++rawDiacriticsIndex;
+      } else {
+        positions.push([i - 1 - shift + 1, shift - 1]);
+        shift -= 1;
+        shiftOrigin += 1;
+      }
+      positions.push([i - shift + 1, shift]);
+      shiftOrigin += 1;
+      eol += 1;
+      return p3.charAt(0);
+    }
+    if (p4) {
+      const hasTrailingDashEOL = p4.endsWith("\n");
+      const len = hasTrailingDashEOL ? p4.length - 2 : p4.length;
       hasDiacritics = true;
       let jj = len;
       if (i + eol === rawDiacriticsPositions[rawDiacriticsIndex]?.[1]) {
         jj -= rawDiacriticsPositions[rawDiacriticsIndex][0];
         ++rawDiacriticsIndex;
@@ -5244,28 +5258,28 @@
         i += len - 1;
         positions.push([i - shift + 1, 1 + shift]);
         shift += 1;
         shiftOrigin += 1;
         eol += 1;
-        return p3.slice(0, len);
-      }
-      return p3;
-    }
-    if (p4) {
+        return p4.slice(0, len);
+      }
+      return p4;
+    }
+    if (p5) {
       positions.push([i - shift + 1, 1 + shift]);
       shift += 1;
       shiftOrigin += 1;
       eol += 1;
-      return p4.charAt(0);
-    }
-    if (p5) {
-      positions.push([i - shift + 1, shift]);
-      shiftOrigin += 1;
-      eol += 1;
       return p5.charAt(0);
     }
     if (p6) {
+      positions.push([i - shift + 1, shift]);
+      shiftOrigin += 1;
+      eol += 1;
+      return p6.charAt(0);
+    }
+    if (p7) {
       positions.push([i - shift + 1, shift - 1]);
       shift -= 1;
       shiftOrigin += 1;
       eol += 1;
       return " ";
@@ -5277,11 +5291,11 @@
         positions.push([i - (shift - j), shift - j]);
       }
       shift -= newCharLen;
       shiftOrigin += newCharLen;
     }
-    return p7;
+    return p8;
   });
   positions.push([normalized.length, shift]);
   return [normalized, positions, hasDiacritics];
 }
 function getOriginalIndex(diffs, pos, len) {
@@ -8001,11 +8015,10 @@
 const THUMBNAIL_SCROLL_MARGIN = -19;
 const THUMBNAIL_SELECTED_CLASS = "selected";
 class PDFThumbnailViewer {
   constructor({
     container,
-    eventBus,
     linkService,
     renderingQueue,
     l10n,
     pageColors
   }) {
@@ -8615,11 +8628,11 @@
   #resizeObserver = new ResizeObserver(this.#resizeObserverCallback.bind(this));
   #scrollModePageState = null;
   #onVisibilityChange = null;
   #scaleTimeoutId = null;
   constructor(options) {
-    const viewerVersion = '3.4.97';
+    const viewerVersion = '3.4.103';
     if (_pdfjsLib.version !== viewerVersion) {
       throw new Error(`The API version "${_pdfjsLib.version}" does not match the Viewer version "${viewerVersion}".`);
     }
     this.container = options.container;
     this.viewer = options.viewer || options.container.firstElementChild;
@@ -12765,12 +12778,12 @@
 __webpack_require__(44);
 var _ui_utils = __webpack_require__(4);
 var _app_options = __webpack_require__(6);
 var _pdf_link_service = __webpack_require__(8);
 var _app = __webpack_require__(3);
-const pdfjsVersion = '3.4.97';
-const pdfjsBuild = '22618213c';
+const pdfjsVersion = '3.4.103';
+const pdfjsBuild = '13af3f344';
 const AppConstants = null;
 exports.PDFViewerApplicationConstants = AppConstants;
 window.PDFViewerApplication = _app.PDFViewerApplication;
 window.PDFViewerApplicationConstants = AppConstants;
 window.PDFViewerApplicationOptions = _app_options.AppOptions;
diff --git a/toolkit/components/pdfjs/moz.yaml b/toolkit/components/pdfjs/moz.yaml
--- a/toolkit/components/pdfjs/moz.yaml
+++ b/toolkit/components/pdfjs/moz.yaml
@@ -18,12 +18,12 @@
   # Usually different from repository url
   url: https://github.com/mozilla/pdf.js
 
   # Human-readable identifier for this version/release
   # Generally "version NNN", "tag SSS", "bookmark SSS"
-  release: 22618213c7f69060d5e7c4823f3f9863588236df (2023-02-12T10:47:57Z).
-  revision: 22618213c7f69060d5e7c4823f3f9863588236df
+  release: 13af3f3442d1e6c0b08c39a54605f6bd5b564b1c (2023-02-17T12:40:54Z).
+  revision: 13af3f3442d1e6c0b08c39a54605f6bd5b564b1c
 
   # The package's license, where possible using the mnemonic from
   # https://spdx.org/licenses/
   # Multiple licenses can be specified (as a YAML list)
   # A "LICENSE" file must exist containing the full license text