Yes, there are problems. Mozilla and developers are having problems because
Mozilla is being very aggressive, to keep pace with Google Chrome. Their
frequency of updates causes add-on breakage. We are alll experiencing it.

BTW, maybe you should turn off Add Block plus (just a suggestion). Many
open source groups rely on advertising revenue. Instead use a pop-up
blocker and Flash Blocker. This will cut down band width and at the same
time help out small time developers and start-ups.