Popular Firefox extension Twitterfox has a new name: Echofon. It's not just a name change, but a redesign with extended features too.

The visual changes might not please everyone - Echofon doesn't look as friendly as before, it's now colder with a slick silver grey interface. Twitterfox users will feel at home, as it basically functions as before, but has improved functionality.

Click on the circular logo in the Firefox statusbar, and the Echfon interface pops up. You can read new tweets, and post your own. It does most of what can do from the Twitter homepage, except viewing your or other people's profile pages. Retweeting, replying and copying tweets is a cinch.

In Preferences you can set how often Echofon will update (it's not real time), and toggle pop up alerts and sounds. You can even keep multiple Twitter accounts on it, and change between them with ease. If you use Echofon Pro on your iPhone, it will sync with Firefox, so you won't see read tweets as new.

For Firefox users, Echofon is a fantastic Twitter tool that comes highly recommended.