Examine source code of Google Search Shortcuts

{
  "name": "Google Search Shortcuts",
  "description": "Keyboard shortcuts to make searching on Google faster",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.google.com/search*"
      ],
      "js": [
        "script.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "version": "2.1.0",
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{10bdbdc0-e1da-4471-96a3-8f4dd6ed38a3}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}