[Bug]:

[IoAvAoI]

Pre-Submission Checklist

• [ ] I have checked the existing/closed issues to ensure this issue has not already been reported.
• [x] I am using the latest supported version of the browser.
• [ ] I have tried disabling all browser extensions/add-ons to rule out interference from these.
• [ ] I have tried clearing the browser cache and cookies.
• [ ] I have checked with a new profile and the issue still occurs.
• [ ] I have provided detailed step-by-step instructions on how to reproduce the issue.
• [ ] I have included relevant screenshots or console outputs.
• [ ] I have checked that this problem is not occurring in the latest version of Firefox ESR.
• [ ] This issue is specific to this browser and does not occur in other browsers.

Bug Summary

Whenever I watch a video on the YouTube UI, I notice background lines. When the UI hides after 3 seconds, the lines disappear as well. this happen in new update

Reproduction Steps

Whenever I watch a video on the YouTube UI, I notice background lines.

Expected Behavior

no background lines.

Actual Behavior

Whenever I watch a video on the YouTube UI, I notice background lines. When the UI hides after 3 seconds, the lines disappear as well. this happen in new update

Screenshots

Browser Version

11.23.0 (64-bit)

Operating System

Windows 11 pro 23H2 OS build 22631.4890

Additional Context

No response