Examine source code of Tom's Bookmark Saver

{
  "manifest_version": 2,
  "name": "Tom's Bookmark Saver",
  "version": "1.4.9",
  "description": "A bookmark extension that syncs the bookmarks via WebDAV, for example with NextCloud.",
  "icons": {
    "48": "icons/logo-48.png",
    "96": "icons/logo-96.png"
  },
  "permissions": [
    "bookmarks",
    "storage",
    "notifications",
    "webRequest",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "sync.js",
      "storage.js",
      "webdav.js",
      "bookmarks.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": "icons/logo.svg"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3625c546-2af3-41b5-8a51-1322108cb261}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}