Examine source code of QR Code Generator

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "version": "1.0",
  "description": "__MSG_extDescription__",
  "default_locale": "en",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon48.png",
    "default_title": "__MSG_extName__",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "qrcodegenerator@moomtain.com"
    }
  }
}