Examine source code of Devol Librex

{
  "manifest_version": 2,
  "name": "Librex",
  "version": "1.0.0",
  "author": "FrugalBard499",
  "description": "This extension makes the Librex instance hosted by Devol as the default search engine",
  "icons": {
    "16": "./icon16.png",
    "24": "./icon24.png",
    "32": "./icon32.png",
    "48": "./icon48.png",
    "96": "./icon96.png",
    "128": "./icon.png"
  },
  "permissions": [
    "search"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9659bd7d-695a-4b46-b552-bb17ed67df6e}"
    }
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "LibreX",
      "keyword": "@lx",
      "search_url": "https://librex.devol.it/search.php?q={searchTerms}",
      "favicon_url": "https://librex.devol.it/favicon.ico",
      "is_default": true
    }
  }
}