Gentlemen; This same built against gtk3 problem is killing firefox, rendering it unusable on machines that still have mostly gtk2, such as wheezy, which is LTS till sometime in 2020. I would think firefox should be available built against gtk2 until the last version of LTS is out of support. So please consider the LTS people and build us a gtk2 version of firefox.
Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene>
