Examine source code of StartView

{
  "manifest_version": 3,
  "name": "StartView",
  "version": "1.5",
  "description": "StartView is a customizable start page extension that allows users to organize and display bookmarks from selected folders",
  "permissions": [
    "bookmarks",
    "storage",
    "unlimitedStorage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "startView@krafi",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "chrome_url_overrides": {
    "newtab": "start.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}