Examine source code of Easy Switch

{
  "background": {
    "persistent": false,
    "scripts": [
      "js/syncloc.js",
      "js/oop.js",
      "js/url.js",
      "js/kw.js",
      "js/bg.js",
      "js/builtin.js"
    ]
  },
  "default_locale": "en",
  "content_scripts": [],
  "content_security_policy": "script-src 'self' ; object-src 'self'; img-src https://*.gstatic.com https://*.gstatic.cn;",
  "description": "__MSG_description__",
  "icons": {
    "128": "icon128.png"
  },
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "page_action": {
    "default_icon": "icon128.png",
    "default_title": "__MSG_defaultTitle__"
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "*://*/*"
  ],
  "short_name": "__MSG_extName__",
  "version": "3.0.5",
  "browser_specific_settings": {
    "gecko": {
      "id": "{c1ebe747-6504-4cc9-8330-a03d33af8dcc}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}