For about a month or so I have been having this problem. Every once in awhile when using Firefox it will pop up to a full sized white screen except for my taskbar and freeze for a couple of seconds. This will happen usually when I am opening a new page/link or moving to a different tab. I have quite a few tabs open but I have always ran Firefox this way and never had problems before.

Sometimes after flashing white several times Firefox will crash. Ending the Firefox task in Task Manager, running a cleaning program and restarting fixes this for a while but it still keeps happening. Any help or advice is appreciated.