Examine source code of Nextcloud Bookmark Sync

{
  "manifest_version": 3,
  "name": "Nextcloud Bookmark Sync",
  "version": "1.4.0",
  "description": "Cross-browser bookmark synchronization via Nextcloud WebDAV.",
  "permissions": [
    "bookmarks",
    "storage",
    "alarms"
  ],
  "host_permissions": [
    "https://*/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Nextcloud Bookmark Sync",
    "default_icon": {
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "nextcloud-bookmark-sync@hollow.ovh",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}