Flash doesn't work on firefox for me at home. At work, everything works just fine. For example, for some sites, video's don't play. some players stop loading at 99%, some players don't start at all. I use deezer at deezer.com. The audio player doesn't work at home (it doesn't even load, nothing is displayed), but it does at work. With other browsers I tried at home (tried IE and Edge), everything works just fine. I use firefox 44.0.2 at work. At home, I'm at the newest version (45.0.something). I have the same addons and plug-ins installed at home and at work. I reset firefox. Same problem I tried uninstalling firefox and flash. Then rebooted, then reinstalled both. That didn't solve it. But I noticed I didn't need to reinstall my addons, so not everything got deleted when I uninstalled. I also installed the beta of firefox, but it also doesn't work with that.