Fontface Ninja for Firefox

Fontface Ninja is an informative extension that can help identify any unknown font you find online.

After you add it to your browser, Fontface won’t be activated unless you click on it. This way, you won’t be bothered by the text bubbles popping up in your face every time you hover the cursor over any piece of text.

It may sound annoying to always click on it every time you need to check a font, but getting spammed with text bubbles every time you rest the cursor on a text segment would be worse.

If you are casually browsing a website and a certain font is getting your attention, just activate the extension and see what that's about. After you start the app, any text that gets under the cursor will display a small information bubble. The name, number of pixels, height and identification number are going to be inside the bubble.

FontFace’s UI will create a list of the discovered items that can provide you with extra information or buy links for paid fonts.

The extension can help you bookmark fonts in order to help you remember them. But before being able to bookmark any font, you have to connect to the Fontface Dojo. 

FaceFont Dojo is a separate page that requires you to log in first. After you have created an account (or link your Facebook, Google account) you get your slice of the dojo, which is in fact a huge library that showcases all the popular fonts you’ve added.

FaceFont Ninja is a handy tool can help you do some quick research about the fonts you encounter on a daily basis. The information bubbles are not intrusive and do not stay on longer than you need. Also, the Dojo is a useful feature for users who are in a hurry and want to review the information at a later time.