1920380 - The List All Tabs button moves when entering/exiting fullscreen

Status: NEW

(Firefox :: Tabbed Browser, defect, P5)

Description

[[e-mail]]

Attachment: Recording 2024-09-22 200144.mp4

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:130.0) Gecko/20100101 Firefox/130.0

Steps to reproduce:

On Windows, I entered fullscreen on any site

Actual results:

The downward facing arrow to search tabs next to the window controlls shifted to the right and when exiting, it shifted to the left again

Expected results:

It remains in the same position

Comment 1

[[e-mail]]

Attachment: Difference.png

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Firefox::Tabbed Browser' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[Simona Badau, Desktop QA]

I can reproduce the issue where the List All Tabs button shifts to the right when entering and exiting Full Screen mode. This was reproduced on Windows 11 using Firefox 131 and Nightly 132.0a1.

It is not a regression, as I was able to reproduce it since Firefox 100, with the browser.tabs.tabmanager.enabled preference set to true.

Comment 4

[Marco Bonardo [:mak]]

It's possible we are removing the dragging space that is on the left of the OS buttons and on the right of the tab manager button (or any other button one may put there).

Comment 5

[Dão Gottwald [:dao]]

(In reply to Marco Bonardo [:mak] from comment #4)

It's possible we are removing the dragging space that is on the left of the OS buttons and on the right of the tab manager button (or any other button one may put there).

This part is intentional; we don't want the drag space in fullscreen. However it may be possible to make this less visually jarring by removing the drag space after the animation has finished.