diff --git a/src/background.js b/src/background.js
index 77fcc6f..7b7deeb 100644
--- a/src/background.js
+++ b/src/background.js
@@ -23,19 +23,9 @@ chrome.runtime.onInstalled.addListener(function () {
   });
 });
 
-chrome.contextMenus.onClicked.addListener(function (info) {
+chrome.contextMenus.onClicked.addListener((info) => {
   if (info.menuItemId == 'ImgSrc-er') {
-    convertToImgTag(info);
-  }
-});
-
-/**
- * Convert the selected object into an HTML img tag and save the string on clipboard.
- * @param {Object} info Object containing the information on the right-clicked object.
- */
-function convertToImgTag(info) {
-  var taggedUrl = '';
-  try {
+    let taggedUrl = '';
     if (info.selectionText) {
       taggedUrl = imgTaggedUrl(info.selectionText);
     } else if (info.linkUrl) {
@@ -44,17 +34,14 @@ function convertToImgTag(info) {
       taggedUrl = imgTaggedUrl(info.srcUrl);
     }
     // Save to clipboard
-    let textArea = document.createElement('textarea');
-    document.body.appendChild(textArea);
-    textArea.value = taggedUrl;
-    textArea.select();
-    document.execCommand('copy');
-    document.body.removeChild(textArea);
-  } catch (error) {
-    let message = `${error.message}\n\n▼詳細\n${error.stack}`;
-    alert(message);
+    chrome.tabs.query({ active: true, currentWindow: true }, (tabs) => {
+      chrome.tabs.sendMessage(tabs[0].id, {
+        message: 'copyText',
+        textToCopy: taggedUrl,
+      });
+    });
   }
-}
+});
 
 /**
  * Encapsulate the entered URL string in an HTML img tag.
diff --git a/src/content.js b/src/content.js
new file mode 100644
index 0000000..6f3acbc
--- /dev/null
+++ b/src/content.js
@@ -0,0 +1,40 @@
+// Copyright 2022 Taro TSUKAGOSHI
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/* global chrome */
+
+chrome.runtime.onMessage.addListener((request, sender, sendResponse) => {
+  if (request.message === 'copyText') {
+    console.info(
+      `[ImgSrc-er] Copying text "${
+        request.textToCopy
+      }" to clipboard (sender: ${JSON.stringify(sender)})`
+    );
+    copyToTheClipboard(request.textToCopy);
+    sendResponse();
+    return;
+  }
+});
+
+function copyToTheClipboard(textToCopy) {
+  const el = document.createElement('textarea');
+  el.value = textToCopy;
+  el.setAttribute('readonly', '');
+  el.style.position = 'absolute';
+  el.style.left = '-9999px';
+  document.body.appendChild(el);
+  el.select();
+  document.execCommand('copy');
+  document.body.removeChild(el);
+}
diff --git a/src/manifest.json b/src/manifest.json
index 526048d..284baf5 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -1,12 +1,17 @@
 {
   "name": "__MSG_extName__",
-  "version": "1.0.2",
+  "version": "2.0.0",
   "description": "__MSG_extDescription__",
   "permissions": ["contextMenus", "clipboardWrite"],
   "background": {
-    "scripts": ["background.js"],
-    "persistent": false
+    "service_worker": "background.js"
   },
+  "content_scripts": [
+    {
+      "matches": ["<all_urls>"],
+      "js": ["content.js"]
+    }
+  ],
   "default_locale": "en",
   "icons": {
     "16": "images/ImgSrc-er16.png",
@@ -14,5 +19,5 @@
     "48": "images/ImgSrc-er48.png",
     "128": "images/ImgSrc-er128.png"
   },
-  "manifest_version": 2
+  "manifest_version": 3
 }