Examine source code of AutoTabRefresh

{
  "name": "AutoTabRefresh",
  "author": "",
  "version": "3.3",
  "description": "Refresh your browser tab automatically at the desired interval.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "Auto Tab Refresh",
    "default_popup": "index.html"
  },
  "background": {
    "page": "background.html"
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{c17eb700-84fb-49ea-9554-0db469f59f4b}"
    }
  }
}