Examine source code of AutoRefresh Tabs

{
  "manifest_version": 2,
  "name": "AutoRefresh Tabs",
  "version": "1.0",
  "description": "Automatically refresh tabs at a specified interval.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_title": "Auto Refresh Tabs",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c7595f80-6428-4e48-a593-741da75f3aa0}"
    }
  }
}