Comment by CompuHacker

Hardware firewalls provide some protection against the kinds of threats XP faces. More to answer your question; I'm running the latest available versions of Windows 10. I sometimes use FF 56 for its consistency in behavior, XPI addon support (NoScript and uBlock still function), customizable UI, and for critical tasks (banking (affected by the Cloudflare problem)). I use FF 90+ for daily driving, and I despise it.