How to Write on Glass

When I first saw the Glass add-on for Firefox, I was in awe of how well their overlays onto any web pages worked. I tried to look through the code, but couldn’t quite get a handle on what they were doing. So I pinged one of their developers, Ryan Wolf, and he spilled the beans.

This post is a must read for any add-on developer. Gives great insight into a really cool Firefox add-on technique.