Amazing! First of all, thank you. 

Secondly, I noticed Firefox is beginning testing of addons for their Preview build, which is what runs on Oculus Quest and Go VR headsets. The first few hand picked addons should be available first half of this year. 

In our (@dlux-io) effort to bridge the gap between HIVE and WebXR, getting this addon supported would be an enormous leap forward, as it would allow HIVE signing in VR! 

I don't know if there's much you can do right now, just wanted to get it on your radar. Here is their announcemnt: https://support.mozilla.org/en-US/kb/add-compatibility-firefox-preview