"Something went wrong" creating a shelf in v3 - `crypto.randomUUID is not a function`

On the v3 beta, creating a bookshelf fails every way I try it: the "Get started" menu on the home screen and the "Create new shelf" button on the shelves screen both show "Something went wrong" / "This page couldn't load", and "Pin as shelf" from the tags screen shows "Failed to pin shelf". The console error is crypto.randomUUID is not a function. Creating collections works fine. Firefox on Linux, hitting the container over a plain-HTTP LAN IP.

Resolution: crypto.randomUUID() is only available in a secure context, so any page served over plain http:// to a non-localhost address will throw this - it has nothing to do with your browser being out of date or your distro. Confirm quickly by opening the console and running crypto.randomUUID(): on an insecure origin it throws, on HTTPS it returns a UUID. Either serve the instance over HTTPS (reverse proxy with a cert) or reach it via localhost, and shelf creation works immediately. The shelf code was also patched to stop depending on the secure-context API, so upgrading to a v3 beta cut after this report removes the requirement.