Gosh. Starting from Mozilla 0.9.8, this browser is not able to works with high level animations. Every loop, every rerender, every chaning clip/position/opacity... On the page I gave, there are ten loops executing path (moving, cliping,chaning opacity). After about 10 frames Mozilla stops rendering, and it rerender only after scroll document. It makes DHTML unnecessary... what for? If i cannot make anything? Probably it is problem with JavaScript too. Not only rendering, but loops take about 10 times more time than it should take... This page hangs Mozilla (buffer overflow?), on IE,NS4,Mozilla 0.9.4 it works OK. There is problem with rendering, with positioning, with loops. Steps to Reproduce: Open any of this addresses: http://alladyn.art.pl http://www.dhtmlcentral.com http://www.bratta.com/bratta/ http://www.btinternet.com/~kurt.grigg/javascript/ http://xlat.assembler.org/ <-- this page totally hangs mozilla and lock screen (i cannot move mouse) http://www.endoflow.com/ Test it on IE5.5 (without DX8.0) and on Mozilla 0.9.8 Actual Results: Totally hangs browser window, lock it, use 99% of processor (Athlon 700+384 mb ram), works slow or event not work at all. Expected Results: Normal work of browser, fast animations and normal render speed. Greets Zbigniew Braniecki

there is a bug on poor performance on these sites and DHTML in general. bug 21762 is more related to performance issue. bug 123231 and bug 83852 are related to this bug. This bug is more or less a dup of bug 21762

*** This bug has been marked as a duplicate of 21762 ***