Note that Haiku has OS-, or rather WM-level tabs, too, even if they qualify for one of the most non-discoverable GUI features ever[1] (apparently the idea comes

Note that Haiku has OS-, or rather WM-level tabs, too, even if they qualify for one of the most non-discoverable GUI features ever[1] (apparently the idea comes from the original BeOS). Their web browser doesn’t use them, though. [1]: https://www.haiku-os.org/docs/userguide/en/gui.html#stack-tile https://www.haiku-os.org/docs/userguide/en/gui.html#stack-ti...