I stopped using Windows long ago.
Still have 2 Windows machines in my house.
I keep one of them for referencing things my wife checked on it.
Security in general is better using Linux, but some changes are going on with Firefox and security in general that affect both Windows and Linux systems. Get error message of “wrong user name or password”. When I go to Internet Explorer under the Windows machine it logs in fine.
I have found my old email provider will no longer work under Firefox under Windows or Linux.
The login handshake has changed. Have not fixed that yet.
The vulnerability you posted in this thread is a good example of how platform-independent applications carry potential problems everywhere.
With regard to Windows, I have multiple Win7 instances, of which all but one are VMs; the exception is a dual-boot (BootCamp) on my Mac. They're for running Windows-only applications -- I don't use them for internet access other than updates. My internet work is done primarily on MacOS and Linux (CentOS and Ubuntu), but that's mostly because a lot of my real work is done at an SSH xterm, which are properly integrated into those platforms; none of the third-party bolt-on xterm/SSH solutions for Windows are nearly as handy for my work.