Firefox has known issues with running anything from Godot or Unity it seems. It's becoming hit or miss whether I can play anything without issues, so it could easily just be my browser at this point.
Understandable. Well, at least I want to know that you rated the game based on design and not performance. If you want to give it another try, the update is on.
Construct have linux and mac support, but sadly I don't have any way to test them at the moment. Plus I am not sure if adding a new build before the jam ends is not against the rules.