(Macs? Overpriced, at least here in Europe, not worth the "Mac Tax".
I'm posting this from a 5-year old Compaq laptop running Ubuntu Linux, and it's been a complete pleasure compared to the "learning experiences" I got from other distros . If performance was a problem I could use the minimalist Xubuntu version, but it's not been necessary.)
Another Firefox add-on I like is Foxmarks - synchronize your bookmarks between multiple machines or accounts, automatically.