I encountered difficulty trying to use the terminal when attempting to enter commands. For example if I tried to type 'ls' Firefox captured the #\l and swapped tabs to the left. If I tried to type 'python' Firefox captured the #\h and swapped tabs to the right. If I tried to type 'ruby', Firefox captured the #\u and scrolled the page up.

Unlike just about every other website that captures keypresses with Javascript, this might be one where it has a legitimate reason...at least when the terminal is running.

Good luck.