I can do that i will write download all the addon n after reinstalling firefox will install them back from firefox addon from settings. The only thing i wanted to keep or to backup is my passwords list & bookmarks … and Is there any way that i can install them back after reinstalling firefox automatically & do not have to do manual … if this is a left over from that infection Well uninstalling really fix the issue … I have revo uninstaller i can use it to uninstall firefox well that be good euogh or you can do it from OTL some thing same & uninstall ever thing related to it …