This existing upstream Firefox report looks to be the closest to the problem - there are bugs with defaultPref() under Ubuntu.
https://bugzilla.mozilla.org/show_bug.cgi?id=947838
I have made the (technically correct) fix here - but the defaults will not work properly until the bug is fixed in Firefox: https://github.com/ubuntu-mate/ubuntu-mate-settings/commit/13845909ab5c53ed1dd59a5a9a375e2a7c7d9028
This existing upstream Firefox report looks to be the closest to the problem - there are bugs with defaultPref() under Ubuntu.
https:/ /bugzilla. mozilla. org/show_ bug.cgi? id=947838
I have made the (technically correct) fix here - but the defaults will not work properly until the bug is fixed in Firefox: /github. com/ubuntu- mate/ubuntu- mate-settings/ commit/ 13845909ab5c53e d1dd59a5a9a375e 2a7c7d9028
https:/