I am interested in improving the privacy available to me as a casual internet user with a default browser. I think that Tor is too slow and that the "Privacy Mode" in browsers isn't really practical. I don't care about hiding the history from myself in fact I like having a local history. I care about companies tracking me and profiting from it. There are a lot of Firefox addons for "Privacy and Security". But which ones work, and why do they work?
Interesting TED talk: Tracking the Trackers.