Examine source code of Luxxle

{
  "browser_action": {
    "default_icon": {
      "16": "icons/luxxle_icon_16.png",
      "48": "icons/luxxle_icon_48.png",
      "128": "icons/luxxle_icon_128.png"
    },
    "default_title": "Luxxle Browser Extension"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.luxxle.com/*"
      ],
      "js": [
        "js/luxxlepage.js"
      ],
      "run_at": "document_start"
    }
  ],
  "chrome_settings_overrides": {
    "search_provider": {
      "encoding": "UTF-8",
      "favicon_url": "favicon.ico",
      "is_default": true,
      "keyword": "Luxxle",
      "name": "Luxxle",
      "search_url": "https://luxxle.com/luxsearch?q={searchTerms}",
      "suggest_url": "https://luxxle.com/autocomplete?q={searchTerms}&locale=__MSG_@@ui_locale__&source=luxxlefirefox"
    }
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "default_locale": "en",
  "description": "Search with Luxxle with the browser extension for Firefox.",
  "homepage_url": "https://luxxle.com/",
  "icons": {
    "16": "icons/luxxle_icon_16.png",
    "48": "icons/luxxle_icon_48.png",
    "128": "icons/luxxle_icon_128.png"
  },
  "manifest_version": 2,
  "minimum_chrome_version": "88",
  "name": "Luxxle",
  "permissions": [
    "https://luxxle.com/",
    "http://luxxle.com/",
    "cookies",
    "storage",
    "topSites"
  ],
  "version": "52",
  "browser_specific_settings": {
    "gecko": {
      "id": "{008e2feb-2cf9-46c6-a55b-adf62e4af084}"
    }
  }
}