Examine source code of CMS Backend Opener

{
  "manifest_version": 2,
  "name": "CMS Backend Opener",
  "version": "1.4.3resigned1",
  "description": "__MSG_description__",
  "homepage_url": "http://addons.andreas-ratke.de/",
  "default_locale": "en",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "activeTab",
    "notifications",
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "browser_action": {
    "default_icon": "icons/icon-32.png"
  },
  "background": {
    "persistent": false,
    "scripts": [
      "cms-backend-opener.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "windows": "Alt+Y",
        "mac": "Alt+Y",
        "chromeos": "Alt+Y",
        "linux": "Alt+Y"
      }
    }
  },
  "applications": {
    "gecko": {
      "id": "cmsbackendopener@andreas-ratke.de"
    }
  }
}