Examine source code of Vim Navigation for Google

{
  "name": "Vim Navigation for Google",
  "description": "Vim motions for google search",
  "version": "1.0",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html"
  },
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "permissions": [
    "https://www.google.com/"
  ],
  "content_scripts": [
    {
      "js": [
        "scripts/content.js"
      ],
      "css": [
        "styles/content.css"
      ],
      "matches": [
        "https://www.google.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{af8b61d8-a241-4a24-a61e-2623c3fed846}"
    }
  }
}