I've been using and loving Vivaldi as my web browser lately. After the jam I'm going to test and see if it's Itch's SharedBufferArray support setting, which is marked as experimental but seemed to greatly improve my game's performance. I wouldn't be surprised if an experimental setting on the host platform wouldn't play nicely with every setup. In retrospect, I may not have needed that after some other optimizations, but I'll have to live with my decision until after the jam. Anyway, thanks again for playing, and your game is up next in my queue! :D