The link is close but actually what I experienced was the reverse. I noted the behaviour that new windows were being opened when they should have been in tabs. Whereas the link you provided shows pages opening in tabs when they should be in windows. Maybe it's all one and the same though :) But please don't take my word for it about the other OSs, I can't be sure as I didn't pay much attention. If needed I could test - it wouldn't take long to make a virtual machine and load an OS and then firefox..... Let me know.
-- Firefox doesn't display new windows in new tabs despite option being set https://launchpad.net/bugs/75758 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs