All add-ons will be made compatible by default in the upcoming Firefox 10 release, so it’s crunch time for testing them in Beta, Aurora, and Nightly. With default compatibility, you can expect to see less of the incompatible add-ons dialog, and more of your add-ons should just work.
If you are a Firefox developer, support professional, or contributor, your help is critical—if you think there might be a compatibility issue in any of the release channels, please file a bug here so we can take action right away if needed.
In general, it would be super helpful for everyone to install the Add-on Compatibility Reporter and let us know through the reporter if your add-ons are working properly.
Your help is greatly appreciated!