Bug#894381: Firefox: migration from 45 (GTK2) to 52 (GTK3) produces regressions on Jessie

[Alex ARNAUD]

Package: firefox-esr
Version: 52.7.3esr-1~deb8u1
Tags: a11y jessie
Severity: important

It's a follow up of the bug 870719: 
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=870719

Same Thunderbird regression on Firefox. I'm not sure the policy 
authorize us to migrate an application from GTK2 to GTK3 on a stable 
release.

IMO, until GTK2 is available from the Mozilla compilation file, we 
should provide Firefox ESR compiled with GTK2 on Jessie.

Best regards,
Alex.