Firefox / LibreWolf errored out with
The following features required to run Godot projects on the Web are missing: WebGL2 - Check web browser configuration and hardware support
It runs in Chromium though.
Viewing post in Paraploimos Emporion comments
Yeah, looks like a feature to protect against fingerprinting. It’s a shame that Godot „crashes” however.
I couldn’t find an issue on it.
Kudos to Doubi for highlighting this idea.