Examine source code of BingEnhancer

{
  "name": "BingEnhancer",
  "version": "2.0.0",
  "description": "Edge and Firefox extension that adds additional buttons to Bing.",
  "manifest_version": 3,
  "icons": {
    "16": "./images/icon16.png",
    "48": "./images/icon48.png",
    "128": "./images/icon128.png"
  },
  "background.service_worker": "./js/sw.js",
  "content_scripts": [
    {
      "js": [
        "./js/bangs.js",
        "./js/bangParser.js",
        "./js/bingEnhancer.js"
      ],
      "matches": [
        "*://*.bing.com/*",
        "*://*.ecosia.org/*"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{481F603C-4B39-4349-B091-35CD0C05ED1A}",
      "strict_min_version": "109.0"
    }
  }
}