1889606 - After closing or opening a tab without leaving the tab strip, there is no delay in displaying the tab preview

Status: VERIFIED FIXED

(Firefox :: Tabbed Browser, defect, P3)

Description

[Alexandru Trif, Desktop Test Engineering [:atrif]]

Attachment: preview_4.gif

Found in

• 126.0a1 (2024-04-04)

Affected versions

• 126.0a1 (2024-04-04)

Tested platforms

• Affected platforms: Windows 10x64, Ubuntu 23, macOS 12
• Unaffected platforms: none

Preconditions

• browser.tabs.cardPreview.enabled: true

Steps to reproduce

1. Open some random tabs and hover over them until the tab preview is displayed.
2. Without leaving the tab strip close a tab located in the middle of the other tabs.

Expected result

• The tab preview is displayed after 500ms.

Actual result

• The tab preview is displayed instantly.

Regression range

• Pushlog: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=7b609d9f295fce7ab954f09492fea414b72843e6&tochange=a387d4331dd332c954d2689a4a8b64c2181690b1
  Possible regressor: Bug 1876522

Additional notes

• Attached a screen recording.
• This also happens when opening a new tab.

Comment 1

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

:dwalker, since you are the author of the regressor, bug 1876522, could you take a look?

For more information, please visit BugBot documentation.

Comment 2

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

Set release status flags based on info from the regressing bug 1876522

Comment 3

[Alexandru Trif, Desktop Test Engineering [:atrif]]

This seems to be fixed by bug 1890397 with Firefox 127.0a1 (20240422214652) on Windows 10x64, macOS 12 and Ubuntu 22. Closing this. Thank you!