User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:88.0) Gecko/20100101 Firefox/88.0

Steps to reproduce:

1. Use system settings and/or about:config to set prefers-reduced-motion.

2. Open a lot of tabs, so they don't fit within the width of the window.

3. Firefox will have arrows at each end up the tab list. Click an arrow.

Actual results:

4. While you hold the arrow, Firefox will animate scrolling this.

Expected results:

5. If it jumped, say 10 tabs per click, that would avoid animation. It wouldn't be as disorienting or as likely to cause migraines.

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Cocoa' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Hello MarjaE! I have tried to reproduce the issue using Firefox 91.0a1 (2021-06-07) with macOS 10.15.7 and with the reduced motion option enabled from the system. Unfortunately I haven't spotted something out of the ordinary.

However as per your expected result firefox does skip a few tabs if you double-click on one of the arrows. If this helps you please give a reply in order to solution this issue.

If the solution mentioned above is what you expected could you please provide a screen recording with the issue you are encountering in order to further investigate this issue.

Thank you!

I turned off my frame-rate setting for this recording.

Hello! Unfortunately I can't spot the difference between the video you sent and the transition that is present on my Imac.
Shilpa can you take a look on this and provide more info on this issue?

Thank you!

Most transition animations are painful migraine triggers.

Hello! I will mark this issue as new in order for our developers to look more into it.

Thank you!

Redirect a needinfo that is pending on an inactive user to the triage owner.
:dao, since the bug doesn't have a severity set, could you please set the severity or close the bug?

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