Examine source code of Offline Web Backup

{
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "manifest_version": 2,
  "version": "1.0",
  "icons": {
    "128": "static/128.png"
  },
  "browser_action": {
    "default_title": "__MSG_extensionName__",
    "default_popup": "static/action.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c2d2f0a6-1b2d-3e3a-3f0d-5b0a15dcf5cd}"
    }
  },
  "permissions": [
    "history",
    "contextMenus",
    "storage",
    "alarms",
    "*://*/*"
  ]
}