Examine source code of OkBookmarks

{
  "manifest_version": 3,
  "name": "OkBookmarks",
  "version": "1.1",
  "description": "A simple bookmarks search engine and manager",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "https://okbookmarks.com/*"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "extension_icon16.png",
    "48": "extension_icon48.png",
    "128": "extension_icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "support@okbookmarks.com"
    }
  }
}