I just restarted Firefox and a window popped up saying that it had upgraded itself and that it was checking for compatibility with my add-ons. Unfortunately, one of them, which I rely on quite extensively, apparently is not compatible with FIrefox 22.0. So now I'm stuck. While I'm hopeful that this will resolve itself, I decided to make sure that it won't happen again. I checked my preferences and found that Firefox was set to automatically install updates and to warn me if this would disable any of my add-ons. So, here is my question: Why didn't it warn me that this would disable an add-on? I am running (now) Firefox 22.0 on a Mac running 10.7.5. --wpd