[Bug] Undo close tab in tabs tray unexpectedly restores tab to top, offscreen

[mcomella]

Steps to reproduce

• Open enough tabs so the tabs tray can scroll
• Scroll to the bottom
• Press X to close tab
• Press Undo on snack bar

Expected behavior

Tab restores in same location it was in before.

Actual behavior

Tab restores at top, off-screen

Video of behavior: https://drive.google.com/file/d/1N2d8tUSJZeOZgMiWR49iYeS9gjapKFro/view?usp=sharing

Device information

• Android device: P2
• Fenix version: Nightly 200610

┆Issue is synchronized with this Jira Task

[yoasif]

Your title is better than mine, but this is a dupe of #11236

[ekager]

on restore we could scroll to the top of the list because we know that the restored tab will be there. Does that make sense @topotropic ?

[topotropic]

on restore we could scroll to the top of the list because we know that the restored tab will be there. Does that make sense @topotropic ?

yes, thanks! If it's possible to add the tab to the position in the list where it was, that would be even better.

[yoasif]

If it's possible to add the tab to the position in the list where it was, that would be even better.

I think this is what ought to happen. In the situation where the user does:

1. Closes tab
2. scrolls tab list far away from current tab
3. restores tab

We should restore to same position it was prior and scroll tab into view.

[ekager]

Part 1 of this is done. We now scroll to a restored tab, so let's QA that.

Opened #12449 for restoring the tab to its previous position

[AndiAJ]

Hi, verified as fixed on Firefox Nightly Build 200711 from 7/11 using the following devices:
• Google Pixel 3a (Android 10)
• Huawei Mate 20 Lite (Android 9)
• OnePlus A3 (Android 6.0.1)

► Video