You can delete too this line in the file and firefox will works like it should
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1605887 Title: Ubuntu MATE Start page are overriding users' preferences. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1605887/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
