Privoxy" -- what is is?

[Argelius]

When I look at Activity Monitor, the only PowerPC app I have running all the time is something called "privoxy".

I've Googled this and and it seems to be some sort of ad-blocking program.

I use Firefox as my primary browser.

Just curious if this is something that I need, or can be deleted (and if so, how to delete it...)

Thanks