Examine source code of Perma.cc

{
  "name": "Perma.cc",
  "description": "__MSG_app_description__",
  "default_locale": "en",
  "version": "2.0.5",
  "manifest_version": 3,
  "icons": {
    "16": "assets/infinity-16.png",
    "48": "assets/infinity-48.png",
    "64": "assets/infinity-64.png",
    "128": "assets/infinity-128.png",
    "256": "assets/infinity-256.png"
  },
  "permissions": [
    "alarms",
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "https://api.perma.cc/*"
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; frame-ancestors 'none'; connect-src 'self' https://api.perma.cc;"
  },
  "background": {
    "type": "module",
    "scripts": [
      "background/index.js"
    ]
  },
  "action": {
    "default_popup": "popup/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox@perma.cc",
      "strict_min_version": "112.0"
    }
  }
}