Examine source code of Premium Search Bar

{
  "manifest_version": 2,
  "name": "Premium Search Bar",
  "version": "1.0",
  "description": "Adds a premium search bar to your browser.",
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5cd9ddf3-2a41-47b1-8a8b-fbbb4c937ad2}"
    }
  }
}