Examine source code of Suspicious Link Shortener

{
  "manifest_version": 3,
  "name": "suslnk – Suspicious Link Shortener",
  "version": "1.0.2",
  "description": "Turn any URL into a hilariously suspicious-looking link. Click the button, get a sketchy link, share the fun.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "suslnk – Make it suspicious"
  },
  "background": {
    "scripts": [
      "background/service-worker.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "suslnk-shortener@nozomi.local",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      },
      "strict_min_version": "140.0"
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "storage"
  ],
  "optional_host_permissions": [
    "https://suslnk.com/*",
    "https://cnfm.top/*"
  ]
}