Each tab displays the usual rotational 'downloading' icon but even if I wait several minutes nothing happens..... Even if I halt all or close all tabs bar one I am no longer able to download any pages unless I close Firefox completely and restart. Upon restart I can then open tabs slowly one at a time but if more than one of my open tabs tries to update similtaneously then the problem reoccurs and I have to restart Firefox once again. I have tried removing & reinstalling Firefox as well as creating an all new profile (importing only bookmarks) with no change