You've got to stop throwing these updates out like cat vomit. PLEASE notify the addon makers so that they have time to update the addon for the latest version. One-third of my addons don't work with 5.0. Why can't you put a addon check BEFORE the installation so that one can decide whether the upgrade is worth it. My screen reader doesn't work. They just updated the software less than a month ago. Is this rapid cat-vomit pace of software updates really necessary?? There are some addons that are absolutely necessary. I cannot use Firefox without a screen reader. Why you don't have one as part of the software installation 20+ plus years after ADA is beyond me. Now, I'm going to have to spend the afternoon uninstalling this piece of useless crap and reinstalling 4.0.1. Firefox is seriously beginning to not be worth the effort. It's a resource pig. You have to modify it (addon) to get it to work reasonably. Not really worth the effort. I've had a problem with the history going into the wrong date bucket for at least a month (probably longer) ... see https://support.mozilla.com/en-US/questions/821193. No response to my post. I'm not the only one with the problem. Why keep updating buggy software and not fixing any of the problems that people are having??