I installed FF 4 beta but it didn't work at all for me. I reinstalled 3.6.13. My bookmarks were all there. But the customized toolbars were gone. I was able to get a few of them back by reinstalling extensions/plugins, but I don't have 'print preview', the 'bookmark star' and many others. I don't know how I originally got them. I've never lost my profile before even when uninstalling. Can you tell me how to do it? What am I missing?