Mark Finkle writes, "We have been putting out the call for extension developers to start the process of updating their extension to work in Firefox 3. It's never fun when your extension breaks because of changes in Firefox, but everyone wants to make the platform better. In doing so, we had to break some eggs." There's lots of information available to help you get your add-ons ready for Firefox 3, including: Firefox 3 for Developers, Updating extensions for Firefox 3, Ensuring compatibility of add-ons and themes for Firefox 3, and Mark's blog posts, among others. There's also an IRC channel where you can get help: #extdev on the irc.mozilla.org server.