Examine source code of Search Engine Selector

{
  "manifest_version": 3,
  "name": "Search Engine Selector",
  "version": "0.0.1",
  "description": "Change default search engine to Search Engine Selector",
  "homepage_url": "https://searchengineselector.com",
  "chrome_settings_overrides": {
    "search_provider": {
      "encoding": "UTF-8",
      "favicon_url": "./images/favicon.ico",
      "is_default": true,
      "keyword": "ses",
      "name": "Search Engine Selector",
      "search_url": "https://searchengineselector.com/?q={searchTerms}"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{15e6878f-5bcf-4415-b910-0255b5572c38}"
    }
  },
  "icons": {
    "16": "images/16.png",
    "24": "images/24.png",
    "32": "images/32.png",
    "48": "images/48.png",
    "64": "images/64.png",
    "72": "images/72.png",
    "96": "images/96.png",
    "128": "images/128.png",
    "144": "images/144.png",
    "180": "images/180.png",
    "192": "images/192.png"
  }
}