Examine source code of Xrate

{
  "name": "__MSG_extName__",
  "short_name": "__MSG_extName__",
  "version": "0.1.0",
  "description": "__MSG_description__",
  "manifest_version": 2,
  "default_locale": "en",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "html/popup.html",
    "default_title": "__MSG_extName__",
    "default_icon": {
      "16": "res/icons/logo/xrate_16.png",
      "32": "res/icons/logo/xrate_32.png",
      "48": "res/icons/logo/xrate_48.png",
      "128": "res/icons/logo/xrate_128.png"
    }
  },
  "icons": {
    "16": "res/icons/logo/xrate_16.png",
    "32": "res/icons/logo/xrate_32.png",
    "48": "res/icons/logo/xrate_48.png",
    "128": "res/icons/logo/xrate_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "css/contentStyle.css"
      ],
      "js": [
        "js/jquery.js",
        "js/contentScript.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "storage",
    "alarms",
    "contextMenus"
  ],
  "web_accessible_resources": [
    "html/bar.html"
  ],
  "author": "Oziku Technologies LLC",
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6b65361-cf08-40d2-93a3-7087195278c9}"
    }
  }
}