1635042 - Tab-strip becomes partially obscured when enabling split-view with Firefox as the secondary window

Status: UNCONFIRMED

(Firefox :: Tabbed Browser, defect)

Description

[Dan Ceban [:okazki98]]

Attachment: 2020-05-04 11-27-28.mp4

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0

Steps to reproduce:

1. Drag any app's window to the side of the screen (thus triggering the split view)
2. Select Firefox as the secondary window for split-view

Actual results:

The tab-strip of the Firefox window becomes partially obscured.

Expected results:

Firefox's UI should be fully visible.

Comment 1

[Peter Magyari (Desktop QA)]

Hi Dan,

I wasn't able to reproduce this issue on Window 10 using Firefox 75/76.0.1 or Firefox Nightly 78
Every version of Firefox snapped in correctly on my end (fully visible tab-strip)

Could you try if this also occurs to you on a new profile? You can find out how to do this here:
https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles#w_start-the-profile-manager-when-firefox-is-closed

Thanks!

Comment 2

[Dan Ceban [:okazki98]]

I was able to reproduce it on a new profile. I can also reproduce it on Nightly 78

Comment 3

[Firefox Bug Husbandry Bot]

Because this bug's Severity is normal and has not been changed, and this bug's priority is -- (none,) indicating it has has not been previously triaged, the bug's Severity is being updated to -- (default, untriaged.)