Not getting the crash either here
Windows XP SP3; FireFox 7.0.1; ATI Radeon HD 4870
Dual-core E5200 2.5 GhZ; 3,5 Go RAM
Strangely enough so far, people with Nvidia had a problem, people with ATI didn't. (please if someone with an ATI encounters this problem, say it fast to discard it as a possible cause).
There wouldn't be reasons for graphic cards to have an influence on such a function, but after all this is computing, anything can happen.