[Bug]: Multi-Row Tab Bar vibrates

[angiioh]

Pre-Submission Checklist

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

Bug Summary

Whenever I get enough tabs that it starts to reach the end of the row, my tabs will start shaking/vibrating back and forth. It will sometimes stop when I am using the end tab instead of one in the middle, or it will stop if I get enough tabs that it creates a second row. This will happen in maximized mode or windowed.

Reproduction Steps

1. Set Multi-Row Tabs to on.
2. Open enough tabs that it starts shaking. In my case, it's around 9-10 tabs.

Expected Behavior

I expect it to be stationary.

Actual Behavior

The tabs are shaking left to right.

Screenshots

Here is a screen recording: https://live.myvrspot.com/iframe?v=fMDg4N2EzODVjZGY3NmFhZDQ1YWUwYTJmNWNhZTMwNmI

Browser Version

11.14.1

Operating System

Linux Mint 21.3

Additional Context

This has been happening for a while, but it's behavior hasn't changed in a while so I figured I'd report it. Thank you!