I just tested it in 3.6.8 on Win 7). No crash for me. Though Firefox has a hard time rendering it (~30FPS, or about 1/2 the frame rate of Chrome, IE9 Platform Preview 4, Safari, or Opera!). Try another browser perhaps ;-)

Also, if you have a lot of add-ons/plugins it could make it even slower (some of these try to modify the page every time it changes).

If you get any error codes, I'd love to know the details! Thx