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.