Hm that's surprising, that's one of the browsers I have tested against and it seems to work ok for me. (I know "It works on my machine" is the lamest developer catchphrase haha).
If you wouldn't mind, could you answer the below questions so I can have a proper dig? I haven't done many 3D Godot Web Exports so trying to pin down any bugs I find.
What OS are you using?
What Safe Browsing Level is configured?
Were any Permissions pop-ups (or any other informational messages) shown by the Browser?
Have you had any issues with any other in-browser games?
No worries if you don't want to answer all/any of these, I appreciate I'm asking for a favour and you're under no obligation to help troubleshoot a random browser game you tried to play haha. Appreciate you giving the game a go either way, thanks :)