WebXR can no longer switch to XR mode in the Quest Browser

[RumarioVR]

Tested versions

• Reproducible in : Godot 4.5.beta1
• Unproducible in : Godot 4.5.dev5

System information

Windows 11 - Godot 4.5.beta1 - Compatibility Renderer

Issue description

WebXR projects can no longer switch to VR mode in the Quest browser. It tries, but reverts to flat mode. By the way, WebXR hasn't worked with OpenXR and PCVR for quite some time, at least since 4.5 or 4.4. At least for me, with Windows 11 and the latest Chrome browser. That's worth checking out, too.

Steps to reproduce

Host a WebXR Project. For example the Godot XR-Tools-Demo Project and try to load it in the Quest Browser. It loaded and starts correctly but after pressing the switch to XR Button it will not switch to VR. In Godot 4.5.dev5 did it still work

Minimal reproduction project (MRP)

Use the Godot XR-Tools-Demo Project

[dsnopek]

Thanks for the report!

The problem is that the official builds are made with Emscripten 4.0.10, but we need to make some changes in Godot to work for that version, which haven't been merged yet.

The changes in PR #107460 will allow building with Emscripten 4.0.10 to work, but there's currently issue with getting that Emscripten version working on CI.

Hopefully, we'll get that all worked out soon :-)

[RumarioVR]

@dsnopek Can you say something about the PCVR issue I mentioned? Will this fixed too? I'm currently working on a few Viverse (https://www.news.viverse.com/post/viverse-webxr-creator-studio-engine-support) WebXR worlds. Viverse was still having issues with WebXR and CORS, but we were able to resolve that today. It would be important for me to have a functioning Godot WebXR for Mobile VR and PCVR. Currently, neither works. This is very important to me because I've already put a lot of work into it and would like to participate in the Viverse Creator Program. My worlds would also be a great advertisement for Godot XR.

[dsnopek]

@dsnopek Can you say something about the PCVR issue I mentioned?

I don't know - it's been awhile since I've tested WebXR with a desktop browser.

Can you provide more information, perhaps in a different issue? All you say above is that it doesn't work with Windows 11 and Chrome, but no information about what that means: are there error messages in the console, does it simply fail to start or do something strange, etc? Also, if you're using the Quest, it would be useful to know which streamer you're using (ie Virtual Desktop, Quest Link, Steam Link) as each of those is a different OpenXR runtime

I don't have access to a Windows machine at the moment to do my own testing