Light blue gradient menu highlights , transparent tabs with rounded corners , diagonal blue tab background .
Looks sharp in Windows 10 , Windows 11 , Linux , Zorin-OS , Gnome , KDE .
Zorin-like blue theme Gnome 3.38 background for tabs mix.
https://gitlab.gnome.org/GNOME/gnome-backgrounds/-/blob/gnome-3-38/backgrounds/adwaita-day.jpg
Unaffiliated fan.