Well, it looks like I may have missed this update by a few days. The Web Developer Extension for Firefox and Mozilla has been updated to v0.9.1. This update adds a few enhancements and bug fixes to an already outstanding extension. The Web Developer Extension is (by far) the most useful extension available for Firefox, and is great for working on your site and diagnosing others.
Thanks for the heads up, Firefox didn’t seem to detect the latest version. *shrug*
Apparently, it hasn’t been updated at the Mozilla update site. It’s still listed there as v0.8.