I can confirm that this bug still exists in firefox 59.0.2+build1-0ubuntu0.16.04.3. Workaround provided in #2 solves the problem.
OS: Xubuntu 16.04.4 x64 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1579587 Title: Firefox ignores default intl.accept_languages value To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1579587/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
