Status bar not hiding in fullscreen video after updating to Firefox 138.0.1 (64-bit) on Windows

Hello, I recently updated my Firefox browser to the latest version, 138.0.1 (64-bit), on Windows. After the update, I noticed that when playing videos in fullscreen mode (for example, on YouTube or other video websites), the Windows taskbar (the bar at the bottom of the screen with the Start menu icon) does not hide automatically. This is affecting my fullscreen viewing experience. Before updating to version 138.0.1, the Windows taskbar would hide correctly when entering fullscreen video. I was wondering if anyone else has encountered a similar issue with the Windows taskbar not hiding, or if there are any suggested solutions to help resolve this problem. Thank you for your help!