As part of end of year maintenance program, i clean my computer and update softwares. I'm currently with Firefox 4.0.1, and want to upgrade to 8. However, the built in updater downloads horribly slow and demands the browser to be active. Most of the times it stated failure and asks me to download the installer myself. I'm okay with this. Firefox has always be my favorite. But before i do 8.0.1's installation, should i uninstall the old one? Or will it be rewritten automatically? Would i lose my bookmarks and extensions this way? Win7 64 bit p.s: (if someone could tell me how to back up 'Scrapbook' data i'll be so thankful)