Examine source code of DuckDuckGo Bangs

{
  "manifest_version": 2,
  "name": "DuckDuckGo Bangs",
  "description": "Add some DuckDuckGo options to text selection menu",
  "version": "1.1resigned1",
  "default_locale": "en",
  "background": {
    "scripts": [
      "DDG_context.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "icons": {
    "64": "icons/DDGfavicon.ico"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4326a1c-ba85-4890-aa9f-1f3ebe611b29}"
    }
  }
}