Flatpak: How can you make Opera remember the window size and position?

[gloewa]

gloewa last edited by gloewa

Unlike all other important browsers Opera has no window-title.
Because of no menu at the edge of the window title its not possible to set some "Special Application Settings ....", like position and size.

How can you set the position and size so that Opera is always launched in the desired position and size?

I am using Manjaro KDE
My commandline looks like this:
run --branch=stable --arch=x86_64 --command=opera --file-forwarding com.opera.Opera @@u %U @@

Opera User since Version 3.x