diff --git a/src/background.js b/src/background.js
index 792fe3bc..c53f5bbb 100644
--- a/src/background.js
+++ b/src/background.js
@@ -14,6 +14,7 @@ var introSiteUrl =
 
 addInstallUrl(introSiteUrl);
 addUninstallUrl(util.getReviewUrl());
+addCopyRequestListener();
 injectContentScriptForAllTab();
 getSetting();
 
@@ -57,7 +58,7 @@ browser.runtime.onMessage.addListener(function (request, sender, sendResponse) {
       sendResponse({});
     } else if (request.type === "recordTooltipText") {
       recordHistory(request);
-      updateContext(request);
+      updateCopyContext(request);
       sendResponse({});
     } else if (request.type === "removeContextAll") {
       removeContextAll();
@@ -172,24 +173,23 @@ async function openPDFViewer(url, tabId) {
   });
 }
 
-// ================= context menu
-async function updateContext(request) {
+// ================= Copy
+
+function addCopyRequestListener() {
+  // context menu handler for copy
+  util.addContextListener("copy", requestCopyForTargetText);
+  //command shortcut key handler for copy
+  util.addCommandListener("copy-translated-text", requestCopyForTargetText);
+}
+
+async function updateCopyContext(request) {
   // remove previous
   await removeContext("copy");
   //create new menu
   browser.contextMenus.create({
     id: "copy",
-    title: "Copy : " + truncate(request.targetText, 20),
-    contexts: [
-      "page",
-      "frame",
-      "selection",
-      "link",
-      "editable",
-      "image",
-      "video",
-      "audio",
-    ],
+    title: "Copy : " + util.truncate(request.targetText, 20),
+    contexts: ["all"],
     visible: true,
   });
   recentTranslated = request;
@@ -204,46 +204,12 @@ async function removeContextAll(id) {
   await browser.contextMenus.removeAll();
 }
 
-browser.contextMenus.onClicked.addListener((info, tab) => {
-  if (info.menuItemId == "copy") {
-    copyOntab(tab, recentTranslated.targetText);
-  }
-});
-
-function copyText(text) {
-  navigator.clipboard.writeText(text);
-}
-
-function runFunctionOnTab(tabId, func, args) {
-  browser.scripting.executeScript({
-    target: { tabId: tabId },
-    func: func,
-    args: args,
-  });
-}
-
-function copyOntab(tab, text) {
-  runFunctionOnTab(tab.id, copyText, [text]);
+function requestCopyForTargetText() {
+  requestCopyOnTab(recentTranslated.targetText);
 }
 
-function truncate(str, n) {
-  return str.length > n ? str.slice(0, n - 1) + "..." : str;
-}
-
-//command shortcut key=====================================
-browser.commands.onCommand.addListener((command) => {
-  (async () => {
-    if (command == "copy-translated-text") {
-      var recentTab = await getCurrentTab();
-      copyOntab(recentTab, recentTranslated.targetText);
-    }
-  })();
-});
-
-async function getCurrentTab() {
-  let queryOptions = { active: true, lastFocusedWindow: true };
-  let [tab] = await browser.tabs.query(queryOptions);
-  return tab;
+function requestCopyOnTab(text) {
+  util.sendMessageToCurrentTab({ type: "CopyRequest", text });
 }
 
 // ================= contents script reinjection after upgrade or install
diff --git a/src/contentScript.js b/src/contentScript.js
index 1d46cc60..73a40902 100644
--- a/src/contentScript.js
+++ b/src/contentScript.js
@@ -29,14 +29,6 @@ var destructionEvent = "destructmyextension_MouseTooltipTranslator"; // + chrome
 const controller = new AbortController();
 const { signal } = controller;
 var mouseoverInterval;
-var rtlLangList = [
-  "ar", //Arabic
-  "iw", //Hebrew
-  "ku", //Kurdish
-  "fa", //Persian
-  "ur", //Urdu
-  "yi", //Yiddish
-]; //right to left language system list
 var writingField =
   'input[type="text"], input[type="search"], input:not([type]), textarea, [contenteditable="true"], [role=textbox], [spellcheck]';
 var isYoutubeDetected = false;
@@ -53,6 +45,7 @@ $(async function initMouseTooltipTranslator() {
   checkYoutube();
   addElementEnv(); //add tooltip container
   applyStyleSetting(); //add tooltip style
+  addBackgroundListener();
   loadEventListener(); //load event listener to detect mouse move
   startMouseoverDetector(); // start current mouseover text detector
   startTextSelectDetector(); // start current text select detector
@@ -196,7 +189,7 @@ function showTooltip(text, lang) {
   hideTooltip(); //reset tooltip arrow
   checkTooltipContainer();
   setTooltipPosition("showTooltip");
-  applyLangAlignment(lang);
+  applyRtl(lang);
   tooltipContainer.attr("data-original-title", text); //place text on tooltip
   tooltipContainer.tooltip("show");
 }
@@ -205,9 +198,8 @@ function hideTooltip() {
   tooltipContainer.tooltip("hide");
 }
 
-function applyLangAlignment(lang) {
-  var isRtl = rtlLangList.includes(lang) ? "rtl" : "ltr";
-  tooltipContainer.attr("dir", isRtl);
+function applyRtl(lang) {
+  tooltipContainer.attr("dir", util.isRtl(lang));
 }
 
 function checkTooltipContainer() {
@@ -330,7 +322,7 @@ function getWritingText() {
   return writingText;
 }
 
-//event Listener - detect mouse move, key press, mouse press, tab switch==========================================================================================
+// Listener - detect mouse move, key press, mouse press, tab switch==========================================================================================
 function loadEventListener() {
   //use mouse position for tooltip position
   addEventHandler("mousemove", handleMousemove);
@@ -444,21 +436,17 @@ function checkMouseOnceMoved(x, y) {
   return mouseMoved;
 }
 
-//send to background.js for background processing  ===========================================================================
-
-async function sendMessage(message) {
-  try {
-    return await chrome.runtime.sendMessage(message);
-  } catch (e) {
-    if (e.message != "Extension context invalidated.") {
-      console.log(e);
-    }
-  }
-  return {};
+function addBackgroundListener() {
+  //handle copy
+  util.addMessageListener("CopyRequest", (message) => {
+    util.copyTextToClipboard(message.text);
+  });
 }
 
+//send to background.js for background processing  ===========================================================================
+
 async function requestTranslate(word, translateSource, translateTarget) {
-  return await sendMessage({
+  return await util.sendMessage({
     type: "translate",
     word: word,
     translateSource,
@@ -467,7 +455,7 @@ async function requestTranslate(word, translateSource, translateTarget) {
 }
 
 async function requestTTS(sourceText, sourceLang, targetText, targetLang) {
-  return await sendMessage({
+  return await util.sendMessage({
     type: "tts",
     sourceText,
     sourceLang,
@@ -477,7 +465,7 @@ async function requestTTS(sourceText, sourceLang, targetText, targetLang) {
 }
 
 async function requestStopTTS() {
-  return await sendMessage({
+  return await util.sendMessage({
     type: "stopTTS",
   });
 }
@@ -490,7 +478,7 @@ async function requestRecordTooltipText(
   targetLang,
   actionType
 ) {
-  return await sendMessage({
+  return await util.sendMessage({
     type: "recordTooltipText",
     sourceText,
     targetText,
@@ -501,7 +489,7 @@ async function requestRecordTooltipText(
 }
 
 async function requestRemoveAllContext() {
-  return await sendMessage({
+  return await util.sendMessage({
     type: "removeContextAll",
   });
 }
diff --git a/src/util/index.js b/src/util/index.js
index c7b0e5f7..ad1ee6e5 100644
--- a/src/util/index.js
+++ b/src/util/index.js
@@ -45,6 +45,15 @@ var defaultData = {
 
 const PARENT_TAGS_TO_EXCLUDE = ["STYLE", "SCRIPT", "TITLE"];
 
+var rtlLangList = [
+  "ar", //Arabic
+  "iw", //Hebrew
+  "ku", //Kurdish
+  "fa", //Persian
+  "ur", //Urdu
+  "yi", //Yiddish
+]; //right to left language system list
+
 var reviewUrlJson = {
   nnodgmifnfgkolmakhcfkkbbjjcobhbl:
     "https://microsoftedge.microsoft.com/addons/detail/mouse-tooltip-translator/nnodgmifnfgkolmakhcfkkbbjjcobhbl",
@@ -293,6 +302,14 @@ export function filterWord(word) {
   return word;
 }
 
+export function truncate(str, n) {
+  return str.length > n ? str.slice(0, n - 1) + "..." : str;
+}
+
+export function copyTextToClipboard(text) {
+  navigator.clipboard.writeText(text);
+}
+
 // inject =================================
 export function injectScript(scriptUrl) {
   return new Promise((resolve) => {
@@ -344,6 +361,10 @@ export function getBase64(url) {
 
 // remain ===================
 
+export function isRtl(lang) {
+  return rtlLangList.includes(lang) ? "rtl" : "ltr";
+}
+
 export function checkInDevMode() {
   try {
     if (process.env.NODE_ENV == "development") {
@@ -353,6 +374,17 @@ export function checkInDevMode() {
   return false;
 }
 
+export function getReviewUrl() {
+  var extId =
+    browser.runtime.id in reviewUrlJson
+      ? browser.runtime.id
+      : "hmigninkgibhdckiaphhmbgcghochdjc";
+
+  return reviewUrlJson[extId];
+}
+
+// browser Listener handler========================
+
 export function postMessage(data) {
   if (self == top) {
     window.postMessage(data, "*");
@@ -362,11 +394,43 @@ export function postMessage(data) {
   }
 }
 
-export function getReviewUrl() {
-  var extId =
-    browser.runtime.id in reviewUrlJson
-      ? browser.runtime.id
-      : "hmigninkgibhdckiaphhmbgcghochdjc";
+export async function sendMessage(message) {
+  try {
+    return await browser.runtime.sendMessage(message);
+  } catch (e) {
+    if (e.message != "Extension context invalidated.") {
+      console.log(e);
+    }
+  }
+  return {};
+}
 
-  return reviewUrlJson[extId];
+export function sendMessageToCurrentTab(message) {
+  chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
+    chrome.tabs.sendMessage(tabs[0].id, message);
+  });
+}
+
+export function addMessageListener(type, handler) {
+  browser.runtime.onMessage.addListener((message, sender, sendResponse) => {
+    if (message.type == type) {
+      handler(message);
+    }
+  });
+}
+
+export function addContextListener(type, handler) {
+  browser.contextMenus.onClicked.addListener((info, tab) => {
+    if (info.menuItemId == type) {
+      handler();
+    }
+  });
+}
+
+export function addCommandListener(type, handler) {
+  browser.commands.onCommand.addListener((command) => {
+    if (command == type) {
+      handler();
+    }
+  });
 }