I have used firefox for many years on Pc s and Imac recently I had an upgrade and now firefox opens half screen and I have make it full screen every time. I tried to find a simply way but failed and pressed dismiss button and now I can't reinstall. I had google password on very secure generated one and most of my passwords have vanished in Motzilla leaving three passwords. What is going on? I am 86 this month and have spent nearly two days wasted. Clearly the web is full of problems, we need simply put my screen or passwords back.