Examine source code of DuckDuckGo Onion

{
  "name": "DuckDuckGo Onion",
  "applications": {
    "gecko": {
      "strict_min_version": "65.0"
    }
  },
  "version": "2022.1.22",
  "description": "Add DuckDuckGo's Onion site as default search to Firefox",
  "icons": {
    "16": "icon_16.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  },
  "manifest_version": 2,
  "chrome_settings_overrides": {
    "search_provider": {
      "favicon_url": "https://duckduckgogg42xjoc72x3sjasowoarfbgcmvfimaftt6twagswzczad.onion/favicon.ico",
      "is_default": true,
      "keyword": "duckduckgogg42xjoc72x3sjasowoarfbgcmvfimaftt6twagswzczad.onion",
      "name": "DDGOnion",
      "search_url": "https://duckduckgogg42xjoc72x3sjasowoarfbgcmvfimaftt6twagswzczad.onion/?q={searchTerms}&t=newext",
      "suggest_url": "https://duckduckgogg42xjoc72x3sjasowoarfbgcmvfimaftt6twagswzczad.onion/ac/?q={searchTerms}&type=list"
    }
  }
}