When i have Firefox opened on a page and i lunch NVIDIA driver, after the install as finished I'm able to see correctly the webpage opened in Chrome but not in Firefox if i let the browser opened durin the upload. After the NVIDIA update Chrome continue to show the webpage where i was previuos, with Firefox i loose all, the Fifrefox window are all blank, no close buttons and no resize button. You can only close by the windows 8.1 preview window so here you have the x for close it and loose your work. I know in the update is better to close all program but i just want report with Chrome this problem doesn't exist and as i love Firefox and i use more Firefox asking here if you look into a solution :-)