Examine source code of OQwant

{
  "manifest_version": 2,
  "name": "OQwant",
  "version": "1.0",
  "description": "Remet l'ancien design de Qwant",
  "icons": {
    "48": "icons/logo.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.qwant.com/*"
      ],
      "js": [
        "OQwant.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{43eaf3e2-6ac1-491c-b306-79a982b89a6f}"
    }
  }
}