The problem is with GTK function stubs being declared in the wrong sections in widget/gtk/mozgtk/mozgtk.c. Another recent upstream change did that too: https://phabricator.services.mozilla.com/D82804.
And this patch fixes it: https://bazaar.launchpad.net/~mozillateam/firefox/firefox.xenial/revision/1450
The problem is with GTK function stubs being declared in the wrong sections in widget/ gtk/mozgtk/ mozgtk. c. Another recent upstream change did that too: https:/ /phabricator. services. mozilla. com/D82804.
And this patch fixes it: https:/ /bazaar. launchpad. net/~mozillatea m/firefox/ firefox. xenial/ revision/ 1450