Can Someone Tell Me Good Free Firewalls That Will Stop Pop-ups, & Protect From Spyware & Adware That Work?

That will work together with Avast Antivirus program.

How Could Firewalls Be Used To Protect A Website?

how could firewalls be used to protect a website?

What Do Basketball Players Wear To Protect Us From Seeing Their Nasties?

I was wondering, what do the players in the NBA wear to protect others from seeing their stuff when they fall.
You know like when they trip up, and they hanging upside down with their feet high in the air. Their shorts come all the way up, but all you see is some straps and stuff.
Irrelevant but, (it is known black men have huge enormous wangs.)
I was wondering if you knew what those were, and what they are called?
Thanks!