@Bernd thank you for the info. I find a solution but not easy with the GUI but CLI using a tool to manipulate windows : xdotool with command like this one: xdotool windowmove 176160829 100 50 xdotool search --onlyvisible --name firefox etc...
hello, some application (firefox,telegram) have no more border, so i can not resize them. how can i fix them? regards