Examine source code of Notion Search

{
  "version": "3.10.0",
  "manifest_version": 3,
  "name": "Notion Search",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "options_page": "pages/options.html",
  "action": {
    "default_icon": "images/store-icons/icon38.png",
    "default_popup": "search.html?mode=popup"
  },
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "host_permissions": [
    "https://www.notion.so/api/v3/*"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "MacCtrl+Shift+P"
      },
      "description": "Open the popup"
    },
    "open-search-page": {
      "description": "Open the search page in new a tab"
    }
  },
  "icons": {
    "16": "images/store-icons/icon16.png",
    "32": "images/store-icons/icon32.png",
    "48": "images/store-icons/icon48.png",
    "128": "images/store-icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "notion-search@cside.github.io"
    }
  }
}