Not sure if this is a bug or expected behavior for Nautilus now. Can confirm that the middle-mouse button does open a file with a single click. Both the left or middle mouse buttons can drag and drop a file by moving the file, not copying the file. No option appears to select which method to use.
** Changed in: nautilus (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1815284 Title: Middle click down opens file To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1815284/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs