Examine source code of Container Cookie Switcher

{
  "manifest_version": 3,
  "name": "Container Account Switcher",
  "version": "1.0.0",
  "description": "One-click switching between multiple always-logged-in accounts per site, using Firefox's built-in container tabs (no menu digging).",
  "permissions": [
    "contextualIdentities",
    "cookies",
    "tabs",
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Container Account Switcher",
    "default_icon": {
      "48": "icons/icon48.png",
      "96": "icons/icon96.png"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "container-account-switcher@c3dff6a0-f1bf-4874-806c-8fe57c95d1ea",
      "strict_min_version": "112.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}