@clayusmcret - after several hours (and before I found your post on the forum) I finally figured out the the Avast plugin for Firefox was causing all of the problems I was having - specifically with Facebook. My concern now is that I no longer have the browser protection, which has saved me in the past.
I also have a major issue with the firewall blocking access to a computer in my home group; one out of three isn't reachable with the Avast firewall turned on. I've tried making all of the setting agree and still can't get access to the one PC without turning the firewall off. :-(
I, too, wish there was some easy way to go back to the previous version. I have a paid subscription that's good for another year or so, so I guess I'll stick with it and see what happens. If the problems aren't fixed I just won't renew. I'm currently not recommending Avast to users looking for a free, or paid, AV program.