Problem is not fixed in Opera 28 on Ubuntu!
Best posts made by donvito84
Latest posts made by donvito84
RE: Opera 25 - Window size?Future releases
RE: Srarting window size (Opera 28)Opera for Linux
Same problem on Ubuntu 14.04 LTS. VERYY annoying! I even deleted the prferences file (~/config/opera/preferences). That helped for one or two starts but now Opera set back to this annoying behavior. On another Ubuntu machine resetting did not help.