Simply type your mathematical formula into the search box (Alt-K Cntrl-K to get there quick) and you'll get your answer even before you hit the equals sign. Awesome
http://lifehacker.com/software/fire...day--firefox-20-rc-2-all-platforms-206088.php
http://lifehacker.com/software/fire...day--firefox-20-rc-2-all-platforms-206088.php