Examine source code of Trotto go links

{
  "manifest_version": 3,
  "name": "Trotto go links",
  "description": "This extension makes Trotto \"go links\" work seamlessly in Firefox.",
  "version": "1.36",
  "icons": {
    "48": "icon@48.png",
    "128": "icon@128.png"
  },
  "action": {
    "default_icon": "icon@48.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "declarativeNetRequest",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "*://go/*",
    "*://trot.to/*",
    "*://*.trot.to/*",
    "*://www.google.com/*",
    "*://www.google.co.uk/*",
    "*://www.google.co.jp/*",
    "*://www.google.co.in/*",
    "*://www.google.ca/*",
    "*://www.google.com.au/*",
    "*://www.google.com.br/*",
    "*://www.google.de/*",
    "*://www.google.fr/*",
    "*://www.google.es/*",
    "*://www.bing.com/*",
    "*://*.duckduckgo.com/*",
    "*://search.yahoo.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.trot.to/*"
      ],
      "js": [
        "data_injector.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.trot.to/*"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7b14cca3-39f4-4fd0-a991-bd6333f6b124}",
      "strict_min_version": "113.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}