Examine source code of Tab Loader Tracker

{
  "manifest_version": 2,
  "name": "Tab Loader Tracker",
  "version": "1.0",
  "description": "This extension detects tabs that are not loading or have server errors, displays them in the toolbar and refreshes them in groups of 30.",
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9bbe7a13-899c-46b8-b027-ccbe62e93254}"
    }
  }
}