Well... I don't have a Firefox account. But I tried going to the page for it just out of curiosity to see how it might have possibly helped me, and it gave me an error about local storage not being enabled. That gave me enough of a hint to Google that error, and I ended up finding a thing saying to rename your local storage folder so Firefox can regenerate a fresh one. I did that, and my extensions instantly started working again. So that suggestion ended up mostly saving me after all.
However, while the extensions now function properly, they didn't bring back the stuff that was saved in separate files (like the Greasemonkey scripts). But now that I know which folder was causing the issue and still have it backed up, I'll try poking around in there to see if I can locate the scripts. Thanks for the tips.
Hey man, LlamaGuy did encrypt the passwords.
With what? ROT-13?
-CJayC