I stopped using both FF and Thunderbird when they went queer (booted co-creater/CEO).
Thanks to martin_fierro for the ping!
This is a major drag. I rely on Firefox and Thunderbird for all my personal computing (Linux, MacOS, Windows, everything other than iPhone/iPad where I use the default Apple apps) and have done so since the demise of the Netscape suite.
Not to mention that Firefox and T'bird are the default applications in Ubuntu and other Linux distros.
Geez Louise, this sucks. All the alternatives are worse in one or more significant ways. So I don't yet have a plan.