I'm running Firefox in Ubuntu18.04 server, on an LXC container.
On the host I'm running Xepher, which renders the X transferred over ssh.
Xephyr -ac -screen 1920x1200 -br -reset -terminate :2 &
DISPLAY=:2 ssh -Y user@remote firefox &
It works except that Firefox only takes up about 2/3 of the screen in both width and height. If I make scree size 1280x800 then Firefox appears smaller but still takes about 2/3 of the screen in both width and height.
I can't see anything in the Firefox CLI startup parameters, nor does it seem to be a common use case.
How can I set the size (without a window manager) ?
Following comment suggestion I tried xdotool, and it succeeded ::
$ DISPLAY=:10 xdotool getdisplaygeometry
1920 1200
$ DISPLAY=:10 xdotool selectwindow
2097155
$ DISPLAY=:10 xdotool getwindowgeometry 2097155
Window 2097155
Position: 0,0 (screen: 0)
Geometry: 1280x1040
$ DISPLAY=:10 xdotool windowsize 2097155 1920 1200
Following another comment suggestion, in a single command:
DISPLAY=:10 xdotool search --onlyvisible --class Firefox windowsize 95% 95%
