This bug was fixed in the package firefox - 59.0.2+build1-0ubuntu0.14.04.4
--------------- firefox (59.0.2+build1-0ubuntu0.14.04.4) trusty-security; urgency=medium
* Fix LP: #1758107 - Cannot customize toolbars in Unity
-- Chris Coulson <email address hidden> Tue, 03 Apr 2018 14:40:08 +0100
This bug was fixed in the package firefox - 59.0.2+ build1- 0ubuntu0. 14.04.4
--------------- build1- 0ubuntu0. 14.04.4) trusty-security; urgency=medium
firefox (59.0.2+
* Fix LP: #1758107 - Cannot customize toolbars in Unity
-- Chris Coulson <email address hidden> Tue, 03 Apr 2018 14:40:08 +0100