Examine source code of Better Search Engines

{
  "manifest_version": 2,
  "name": "Better Search Engines",
  "version": "1.1.3",
  "description": "Applies various tweaks to popular search engines, including the removal of AI and feedback features.",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.qwant.com/*",
        "https://www.google.com/*",
        "https://duckduckgo.com/*",
        "https://search.brave.com/*",
        "https://www.startpage.com/*"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e91e97ef-a7a2-4eb4-aa77-3e7a7aaaa36f}"
    }
  }
}