Examine source code of Tab Dial

{
  "manifest_version": 2,
  "name": "Tab Dial",
  "version": "1.1.8",
  "description": "A New tab page that shows bookmarks and with an Open Tabs section, you can also click the extension icon to see open tabs, made with touch screens in mind",
  "permissions": [
    "storage",
    "tabs",
    "bookmarks",
    "<all_urls>",
    "activeTab",
    "management"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "icons": {
    "16": "icons/favicon-16x16.png",
    "32": "icons/favicon-32x32.png",
    "48": "icons/favicon-48x48.png",
    "64": "icons/favicon-64x64.png",
    "128": "icons/favicon-128x128.png"
  },
  "applications": {
    "gecko": {
      "strict_min_version": "126.0",
      "id": "{848a4056-d366-4464-900f-485c25001c7c}"
    }
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/favicon-16x16.png",
      "32": "icons/favicon-32x32.png",
      "48": "icons/favicon-48x48.png",
      "64": "icons/favicon-64x64.png",
      "128": "icons/favicon-128x128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  }
}