When I was using Firefox. The problem which I faced was '''every time my antivirus used to give me warning''' '''harmful cookies found source firefox''', even my tracking protection was set to strict. It means that firefox was not able to filter out the harmful cookies (but I used to surf the web normaly does not visited any unknown/harmful website) ''Then I uninstalled the firefox browser and reinstalled it again, but another day I again faced a new problem. '' '''when ever I used to open the browser the popup window comes saying to select a account to continue and the whole browser freezes ''' I totally uninstalled the browser, and will install it again when I'll get the solution..