'''Issue Summary:''' When using a maximized Firefox window with the Windows taskbar set to automatically hide, the taskbar sometimes fails to appear when moving the mouse cursor to the bottom of the screen. '''Steps to Reproduce:''' *Set the Windows taskbar to automatically hide. *Maximize the Firefox window. *Use Firefox normally and intermittently move the mouse cursor to the bottom of the screen. '''Expected Behavior:''' The Windows taskbar should appear when the mouse cursor is moved to the bottom of the screen. '''Actual Behavior:''' The taskbar does not appear consistently when the mouse cursor is moved to the bottom of the screen. This issue is specific to Firefox and occurs frequently, though not every time. The taskbar functions normally with other applications. '''System Information:''' *Windows Version: Windows 10 Pro 22H2 x64 *Firefox Version: Firefox 127.0 (but happens at least since 126.0) '''Additional Notes:''' *The issue has been occurring for several weeks. *No specific pattern has been identified regarding when the taskbar fails to appear. *This issue significantly impacts the user experience as it disrupts workflow and navigation. '''Steps Taken to Resolve:''' *Checked for and installed the latest Firefox updates. *Restarted Firefox and the computer. *Verified that the taskbar behaves normally with other applications. '''Request:''' Please investigate and address this issue in a future update. Any guidance or interim solutions would be greatly appreciated. Thank you for your attention to this matter.