One of the safest, most efficient and bullshitless browsers out there (among others such as Opera).
Has the most useful plugins ever created, such as "FlashBlock" which completely eradicates flash ads on web pages that
may slow down your browsing, and those annoying "Shoot the Ninja and get a free
iPod!" ads. As well as Fasterfox, which optimizes the speed, and many more.
The great thing about this browser is that it DOESNT install
crap on your
computer without asking you prior to that...Internet Explorer by Microsoft, for example, randomly changes it's homepage, installs adware and spyware and third party
crap without your knowing.
With a built in
google toolbar (which, incidentally, doesnt take up 3/5ths of the screen like on IE), it makes searching a breeze.
Definitely the way to go for an optimized browsing experience.