SUMMARY Title bars should not be shown for GTK apps (e.g. Firefox/psensor) on Plasma Mobile to save vertical space and avoid dragging the window. STEPS TO REPRODUCE 1. Open Firefox/psensor 2. See that title bar is shown 3. Press title bar and drag the window OBSERVED RESULT Title bar is shown and window can be dragged around EXPECTED RESULT Title bar is not shown and window cannot be dragged around SOFTWARE/OS VERSIONS Linux/KDE Plasma: Manjaro-ARM KDE Plasma Version: 5.23.4 KDE Frameworks Version: 5.88.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION Hardware: PinePhone
Are you sure the title bar is an SSD title bar? I think it is a CSD one.
waiting on reply to #1
Can also be that it's CSD. Is there a way to verify this?
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Firefox uses CSD by default, and there isn't anything we can do about it with GTK, because it doesn't support xdg-decoration, where we can enforce decorations to be (not) drawn by the compositor without the app showing its own. With Firefox specifically, you can configure it to use server side decorations by making it use a title bar, in which case it should be hidden automatically.