Hi mire7777,

I do not know what is causing this issue, but to fix slowness in Firefox there are some steps you can take.Quick fixes if your Firefox slows down

Sorry but there is nothing about my problem.. I think that this problem has something to do with aero-glass. I noticed that when restart uxsms service in task manager, after that all works normal. Uxsms switch aero-glass off. Also somethimes firefox, when is minimized on taskbar, and not used some time, and if i click on icon again, all his window becomes transparent for a short. I don't have problem with any other application, or browser. But i hear that some application have this issue(with aero), does this cause high cpu, memory leak or something else, don't know. My cpu is ok, physical memory 23% . I have windows 7 64bit(but this also happens in 32bit),my ram is 4gb, windows experience 3.9. Any response is welcome. Thanks..

Thanks for your answer..

Hi mire,

I found these being worked on in the upcoming Australis https://bugzilla.mozilla.org/show_bug.cgi?id=859106 and https://bugzilla.mozilla.org/show_bug.cgi?id=578780which is coming to beta this Thursday.

There are some issues reported that are in the queue as well https://bugzilla.mozilla.org/buglist.cgi?quicksearch=aero&list_id...

Try it in beta and see if there are improvements. We would love to hear the feedback on the improvements being made.