Examine source code of FocusTab

{
  "manifest_version": 3,
  "default_locale": "en",
  "name": "__MSG_app_name__",
  "short_name": "FocusTab",
  "version": "2.0.0",
  "description": "__MSG_app_description__",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "storage"
  ],
  "action": {
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "FocusTab"
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e471af6b-a6d9-47bf-b7de-fbb5a715f371}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}