It existed in 3.6, yes. But for users who are trying migrating from multiple windows to tab groups, it will hit for the first time (as it did for me)
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/583797 Title: "Warn on closing with multiple tabs open" not honored To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/583797/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
