Rated 5 out of 5 stars

Από τον/την Nahtee στις Μάιος 3, 2012 · μόνιμος σύνδεσμος

Since I couldn't add this to my Firefox via "Manage Search Engines"..."Sorry, you need a Mozilla-based browser (such as Firefox) to install a search plugin.", I made it my default SE from the address bar and removed the searchbar from my browser.

imho it's better to do your searches from the address bar anyway.