Examine source code of Tab Title Saver

{
  "manifest_version": 2,
  "name": "Tab Title Saver",
  "version": "1.0",
  "description": "Saves tab titles when a page does not load and displays saved titles via a menu option.",
  "permissions": [
    "tabs",
    "<all_urls>",
    "webNavigation",
    "storage",
    "history"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{11486f06-dbed-4569-a523-c9cf32585e4a}"
    }
  }
}