Well, I use another browser for my e-mail, livejournaling, etc. and I look at my Firefox with PMOG as a neat way of enhancing my daily check of webcomics, news websites, and the like. Because of the way it works, you can get suggestions from other users about alternative news and information sites, which can be quite interesting.

Moreover, I tend to think that as I'm not a sophisticated user, most of my web use is probably already being tracked recorded in some form in any case (I don't constantly use an anonymizer, I have a standard commercial antivirus and firewall, but no special programs) so I'm not as bothered about it as others might be.