No offense but they're not getting inhumane shock treament either if you're going to pull "our stress is holier than thou" and say it's magnitudes higher, I'll be waiting scientific backing on this or else it's just rude... plus they can always just not make me periodically re-install all my addons with no option to just bypass verification... except this time it doesn't work even with the fixes. (Actually, one time I just didn't see it was set to update automatically downgrading one of them. I'm no expert on these issues, really. They just could have asked first in my opinion.) Thanks, Mozillama.
Edit: I had to click "Restart with addons disabled (safe mode)" for those wondering.
It is 0/0 that is undefined. For 1/0 the standard is either infinity (easily checkable in a language like JavaScript or C) or you get the usual talk that you can't mix infinity with numbers and the operation would be meaningless, etc.
Edit: I had to click "Restart with addons disabled (safe mode)" for those wondering.