Massively reduce the performance of firefox since a few months, don't know why, don't know how, but it took me a while to isolate the problem, and it's 100% the kasperky extension. It causing overall performance do decrease, but more importantly COMPLETE freeze of firefox for dozens of seconds, happening randomly, but always in groups, like everything's working fine half the day, and suddenly it's freezing after freezing on every little action, a new tab, closing one, even just scrolling can cause it to freeze, no matter the amount of tabs. Please fix it