I think firefox underestimates their importance in the world. They do not understand the costs involved for IT departments, every time they upgrade. My VPN will not work with Firefox upgrades, for example. Everything must be re-tested, and the vpn software must be recoded.
Then, 2 weeks later, we have to do it again!

I like Firefox and do not like Facebook.

I do not like Google Chrome because it tracks your every click (and probably more).