Generally speaking, jackal, I suspect that the greasemonkey calls that cause older scripts to not work with FF31 are permanent. Try to keep FF 30 going as long as you can, and if you get to a time when other things won't work and you simply must upgrade your FF, then you will have to kiss off those older scripts. No volunteers have stepped forward to rewrite them, and even if they did, at this point it would probably be easier for someone to write completely new scripts from scratch than to try to patch every piece of old code that doesn't work with FF.
Some people report that all these things work fine with Chrome. If you can stomach Chrome, might want to consider that as an option.
I hate to sound like a broken record, but ultimately there will come a day when none of the old add-ons will work. The sooner you give up on them and start using Panel mode, the less pain you'll have in the long run.
2019-10-17 22:46:23 - MGSteve: Some games you're the dog. Some games you're the hydrant.