diff --git a/package-lock.json b/package-lock.json
index 81f69041..178ca2ba 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@d-i-t-a/reader",
-  "version": "2.1.0-beta.1",
+  "version": "2.1.0-beta.2",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@d-i-t-a/reader",
-      "version": "2.1.0-beta.1",
+      "version": "2.1.0-beta.2",
       "license": "Apache-2.0",
       "dependencies": {
         "browserslist-useragent": "^3.0.3",
diff --git a/package.json b/package.json
index 4fa68d6b..61ec09a2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@d-i-t-a/reader",
-  "version": "2.1.0-beta.1",
+  "version": "2.1.0-beta.2",
   "description": "A viewer application for EPUB files.",
   "repository": "https://github.com/d-i-t-a/R2D2BC",
   "license": "Apache-2.0",
diff --git a/src/modules/TTS/TTSModule2.ts b/src/modules/TTS/TTSModule2.ts
index 6c34fc69..9c0d89aa 100644
--- a/src/modules/TTS/TTSModule2.ts
+++ b/src/modules/TTS/TTSModule2.ts
@@ -287,7 +287,7 @@ export class TTSModule2 implements ReaderModule {
           var restOfTheText;
           if (ttsQueueItem && selectionInfo && selectionInfo.cleanText) {
             const sentence = getTtsQueueItemRefText(ttsQueueItem);
-            let startIndex = sentence.indexOf(selectionInfo.cleanText);
+            let startIndex = selectionInfo.rangeInfo.startOffset;
             let textToBeSpoken = selectionInfo.cleanText;
 
             if (ttsQueueItemEnd && idx + 1 === idxEnd) {
@@ -301,14 +301,14 @@ export class TTSModule2 implements ReaderModule {
                 .replace(textToBeSpoken, "")
                 .trim();
             } else if (idxEnd > idx) {
-              let mergedSentenses = "";
+              let mergedSentences = "";
               for (let i = idx + 1; i < idxEnd; i++) {
                 const ttsQueueItemInBetween = getTtsQueueItemRef(ttsQueue, i);
                 if (ttsQueueItemInBetween) {
                   const sentenceInBetween = getTtsQueueItemRefText(
                     ttsQueueItemInBetween
                   );
-                  mergedSentenses += sentenceInBetween;
+                  mergedSentences += sentenceInBetween;
                   restOfTheText = selectionInfo.cleanText.replace(
                     sentenceInBetween,
                     ""
@@ -318,9 +318,9 @@ export class TTSModule2 implements ReaderModule {
 
               if (ttsQueueItemEnd) {
                 const sentenceEnd = getTtsQueueItemRefText(ttsQueueItemEnd);
-                mergedSentenses += " " + sentenceEnd;
+                mergedSentences += " " + sentenceEnd;
               }
-              startIndex = (sentence + " " + mergedSentenses).indexOf(
+              startIndex = (sentence + " " + mergedSentences).indexOf(
                 selectionInfo.cleanText
               );
 
diff --git a/src/modules/highlight/TextHighlighter.ts b/src/modules/highlight/TextHighlighter.ts
index a4df9803..33a5cf65 100644
--- a/src/modules/highlight/TextHighlighter.ts
+++ b/src/modules/highlight/TextHighlighter.ts
@@ -909,16 +909,20 @@ export class TextHighlighter {
 
   // Use short timeout to let the selection updated to 'finish', otherwise some
   // browsers can get wrong or incomplete selection data.
-  toolboxShowDelayed(ev: any) {
-    let self = this;
-    setTimeout(function () {
-      if (!self.isAndroid()) {
-        self.snapSelectionToWord(ev.detail === 1);
-      }
-      self.toolboxShow();
-    }, 100);
+  toolboxShowDelayed(event: TouchEvent | MouseEvent) {
+    this.showTool(event.detail === 1);
   }
 
+  showTool = debounce(
+    (b: boolean) => {
+      if (!this.isAndroid()) {
+        this.snapSelectionToWord(b);
+      }
+      this.toolboxShow();
+    },
+    navigator.userAgent.toLowerCase().indexOf("firefox") > -1 ? 200 : 100
+  );
+
   snapSelectionToWord(trimmed: boolean = false) {
     let self = this;
     let doc = this.delegate.iframes[0].contentDocument;