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Full screen on all video platforms safe area slightly off center revealing desktop/other windows

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Jesse
Jesse
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As of Nov. 12th, 2025 (Firefox Version 145.0 (64-bit)) entering full screen for a video reveals desktop/other program windows.

Tested with different websites, YouTube, Amazon Prime Video and Hulu. Issue is consistent across.

In the images provided there are two sets, one full screen the other not. Set desktop background to bright green to highlight issue.

If it matters, using dual monitor setup (BenQ Mobiuz EX2510) both are 1080p 144hz side and issue occurs on both monitors.

Have already tested basic troubleshooting issues such as restarting Firefox and computer.

Thank you.

As of Nov. 12th, 2025 (Firefox Version 145.0 (64-bit)) entering full screen for a video reveals desktop/other program windows. Tested with different websites, YouTube, Amazon Prime Video and Hulu. Issue is consistent across. In the images provided there are two sets, one full screen the other not. Set desktop background to bright green to highlight issue. If it matters, using dual monitor setup (BenQ Mobiuz EX2510) both are 1080p 144hz side and issue occurs on both monitors. Have already tested basic troubleshooting issues such as restarting Firefox and computer. Thank you.
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