Yes, but as someone supporting firefox, I do test it using nightly (to gather the error logs and running moz regression, as a way to contribute back to free browser offered by Moz).
I already use zen, and it’s not my taste, sorry. (It crash much more than nightly on my machine, so I left it be, keep using official build of firefox).
When Gnome and KDE become so major and even noob user can use it withotu problems? When Libre office take over microsoft in office space?