It can't contain URLs.
The description on https://wordpress.org/plugins/offline-shell/ is currently: A WordPress plugin for caching theme assets via the [ServiceWorker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Serv.
It can't contain URLs. The description on https://wordpress.org/plugins/offline-shell/ is currently:
A WordPress plugin for caching theme assets via the [ServiceWorker API](https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Serv
.