WhatFont - The easiest way to identify fonts on web pages.

What is the easiest way to find out the fonts used in a webpage? Firebug and Webkit Inspector are easy enough to use for developers. However, for others, this should not be necessary. With this extension, you could inspect web fonts by just hovering on them. It is that simple and elegant.

 

It also detects the services used for serving the web fonts. Supports Typekit and Google Font API. Recommended by Wired WebMonkey, Lifehacker, and SwissMiss.