Examine source code of Playground.ru | Messages

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Playground.ru | Messages",
  "version": "1.1resigned1",
  "icons": {
    "16": "16x16.png",
    "32": "32x32.png",
    "48": "48x48.png",
    "128": "128x128.png"
  },
  "permissions": [
    "tabs",
    "http://www.playground.ru/pm/"
  ],
  "browser_action": {
    "default_title": "Playground.ru | Messages",
    "default_icon": "48x48.png",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7b9b509f-a38f-4b2a-b484-2b44c8c9d8e9}"
    }
  }
}