I genuinely don’t know if I left my firewall on or off the last time I fiddled with it, on my Windows 7 machine.
That was like 10 years ago. It’s still my daily use pc. Zero antivirus. Just firefox which was installed 10 years ago. And ad block orgin which was also installed 10 years ago but updated over the years.
Oddly enough, the only website I have issue with is lemmy.