@billm:
That's a horrendously large sync. Looks like it has over 1100 changed files, I'm not totally surprised it's making Firefox cry (mine didn't die, but it certainly had massive issues rendering the page). If it's any consolation, I'm reasonably confident that our Gitorious install wouldn't have been any happier with it.
Gitorious would have just refused to show it entirely, "too large", so it loading at all is definitely an improvement. Gitorious had that nice habit of doing that to small diffs in some circumstances too. That page indeed takes a long time to load but that's just the massive amount of stuff there. Chrome loaded the page about 5* faster than Firefox 4.