Hello Ever since I have upgraded to the Firefox 7.01 and now 7.02 in either the regular Firefox or the portable version most of the browser is not visible. Tabs, for instance will not show until I pass the cursor over them. I can see through to to the desktop in many places on the top of the browser. Also When I try to scroll down the pages there are numerous horizontal black bars and often the text lines seems to appear on top of each other. I have installed the latest Java and Flash updates without any improvement. If I use Internet Explorer or Google Chrome this does not happen. Firefox 6.02 works fine!