Examine source code of Auto Refresh Tab Lite

{
  "manifest_version": 2,
  "name": "Auto Refresh Tab Lite",
  "version": "1.0",
  "description": "Automatically refreshes the current tab at a fixed interval.",
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Auto Refresh Tab"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{df133d7e-4ce3-45d1-9e16-e8d76e5680d5}"
    }
  }
}