They have acknowledged the defect and are working on a fix. While this is a severe impact, I am still with Firefox. The are enough alternative browsers to tide over the problem for now. The fact that alternatives exist is the reason why we should support projects like Firefox.
Just curious, should we expect that the fix (issuing a new signing cert and re-signing all the addons and whatnot) will result in the addons being automatically updated and re-enabled? They certainly seem to have streamlined disabling the addons, I wonder if it is equally simple from a users perspective to bring them back. Also now wondering just how hard their network/CDN is going to get slammed when those new re-signed addons go live and every user automatically redownloads them.