Quantum is great. Keep crying, chromecucks.
Reliability is important to me, and to me that's much more than stability in any one particular version of the program, but being able to trust that features I use will continue to be usable until I decide that they aren't needed. The way the MF keeps forcibly rolling out changes means I can't trust them to provide a stable platform. For now, it will continue to be my primary browser because it's not yet worth the effort to change, but when I next get a new computer, Firefox will not be my primary browser. I can't trust the MF won't break something else for me.