Examine source code of BypassKit - Link Unlocker

{
  "manifest_version": 2,
  "name": "BypassKit - Link Unlocker",
  "version": "1.0.0",
  "description": "Quickly resolve shortened or redirected URLs to reveal the final destination link. Simple, fast, and privacy-friendly.",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "BypassKit - Link Unlocker"
  },
  "permissions": [
    "https://api.bypasskit.co/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "bypasskit@bypasskit.co",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'"
}