How to add window exceptions to hide the Firefox title bar in KDE using Oxygen


1. From the Kickoff Launcher select "System Settings"

2. From the "System Settings" window select Workspace Appearance

3. Select "Oxygen" (if it's unselected) and click the button "Confugure Decoration"

4. Select the tab "Window-Specific Overrides"

5. Now we have to create 2 exceptions

6. Use these values for the first exception
Matching window property: Window Title
Regural Expression to match: Mozilla Firefox
Check Hide window title bar

7. Use these values for the second exception
Matching window property: Window Class Name
Regural Expression to match: Firefox
Check Background style and select Radial gradient
Check Separator display and select Always Draw Separator

Done! Now Now you may need the buttons minimize, maximize,close or drag to control the window. Customize the toolbars in Firefox and you'll find these toolbar buttons and drag them into the main Firefox window.