Maybe a little unintentional glitch...
I can't see all of my screen. The bottom part is bugged out (no pun intended) and I can't scroll or go fullscreen.
Also might want to mention that it only runs at like 5 FPS.
I'd believe that. Additionally, I won't judge you if you choose not to fix it. I've seen it before where it was a problem of Firefox handling the code differently than other browsers. Just making sure you're aware of the issue so you can choose to fix or warn people or whatever you choose to do with the information.