I was getting an error message from SBIE saying something like "Com error", with some letters in there too. I heard others discuss this too in a threat about FF v27, which I for some reason cannot find now. 99% of the time I install the apps and I never face the problems other people do, so I don't let it scare me away. But this seems to be a pretty universal thing. It's happened to every box I've seen SBIE on, from their newest release to v3.76. So if this isn't happening to you I'd guess you're the exception and not the norm. So I think I'll just stay on FF v26 in the meantime. And hopefully hear some good news that this error is corrected in short order. I guess this is a good time to test whether the good customer support will still be there after Tzuk's sold the company. He'd probably have this entire situation resolved by now. Please post in this thread when this problem is resolved so that other people having it as well know when to upgrade FF to v27.