Well, I wasn't suggesting you go an add every add-on available! I thought you might have remembered a few of the ones you had instlled and just add some of those!
That should be fewer than 100, anyway!!! But FF should be telling you when you have an incompatible add-on, anyway. At least that's what seems to happen when I download a new version of it.
The key is to only install one at a time, preferably only one or two in a week. Then use FF for a few days and see if things go awry. If it does, you'll only have to remove the last one or two that you installed. Remember that any one add-on may be fine, by itself, but it may not 'play well with others.' In that case, you may want to investigate further to divide which one of a pair gets the boot!
But, whatever you find out, please add it to the info here!