I'll look into this for Firefox, but it may not help.
Our IT department seems to think that IE is the greatest browser ever, when in reality, it's an obsolete piece of shit.
We've tried other browsers:
Firefox: the IT guys did something that renders it unusable. __Opera: It works great, except for 1 website that we need for training.
Vivaldi: This is the only browser where our training site works, but we need flash in order for it to work.
As for Chrome, it wouldn't work with the training site I mentioned before, and even if id had, it would pain me greatly to have to use it. I hate it almost as much as as I hate IE.