1989200 - Fx View card contents are no longer collapsible

Status: VERIFIED FIXED

(Firefox :: Firefox View, defect)

Description

[Petruta Horea [:phorea]]

Found in

• Firefox 144 beta 1

Affected versions

• Nightly 145.0a1 (2025-09-17)
• Firefox 144 beta 1
• Firefox 143.0 RC

Tested platforms

• Affected platforms: Win 11, Ubuntu 24, mac OSX 15
• Unaffected platforms: -

Steps to reproduce

1. Open Firefox View - Recent Browsing section
2. Collapse and expand each section: Open Tabs, Recently Closed Tabs, Tabs from other devices by clicking their titles or the left arrow.

Expected result

• Section is collapsed/expanded.

Actual result

• Card contents are not collapsed.

Regression range

• First bad: 2025-09-06
• Last good: 2025-09-05
• Pushlog: https://hg-edge.mozilla.org/integration/autoland/pushloghtml?fromchange=fa22459a0979f0773edd19228ae0d3f9e1730187&tochange=2eb6e94eada2cb2730463e9e681f80f3371fa989
• Potentially regressed by: bug 1986767

Comment 1

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

:emilio, since you are the author of the regressor, bug 1986767, could you take a look?

For more information, please visit BugBot documentation.

Comment 2

[Emilio Cobos Álvarez [:emilio]]

[Tracking Requested - why for this release]: Very visible regression.

Comment 3

[Emilio Cobos Álvarez [:emilio]]

Attachment: Bug 1989200 - Keep fxview details collapsible. r=#fxview-reviewers!

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/4adfaa22c064
https://hg.mozilla.org/integration/autoland/rev/95ceda6539c3
Keep fxview details collapsible. r=fxview-reviewers

Comment 5

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/95ceda6539c3

Comment 6

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

The patch landed in nightly and beta is affected.
:emilio, is this bug important enough to require an uplift?

• If yes, please nominate the patch for beta approval.
  • See https://wiki.mozilla.org/Release_Management/Requesting_an_Uplift for documentation on how to request an uplift.
• If no, please set status-firefox144 to wontfix.

For more information, please visit BugBot documentation.

Comment 7

[Emilio Cobos Álvarez [:emilio]]

Comment on attachment 9513949 [details]
Bug 1989200 - Keep fxview details collapsible. r=#fxview-reviewers!

Beta/Release Uplift Approval Request

• User impact if declined/Reason for urgency: regression with trivial fix
• Is this code covered by automated tests?: Yes
• Has the fix been verified in Nightly?: Yes
• Needs manual test from QE?: Yes
• If yes, steps to reproduce: comment 0
• List of other uplifts needed: none
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): One-liner
• String changes made/needed: none
• Is Android affected?: No

Comment 8

[Donal Meehan [:dmeehan]]

Comment on attachment 9513949 [details]
Bug 1989200 - Keep fxview details collapsible. r=#fxview-reviewers!

Approved for 144.0b4

Comment 9

[Pulsebot]

https://github.com/mozilla-firefox/firefox/commit/30589edd721f
https://hg.mozilla.org/releases/mozilla-beta/rev/f21a9d896739

Comment 10

[Petruta Horea [:phorea]]

Verified as fixed on Nightly 145.0a1 2025-09-21 across platforms. Waiting for the fix to land on beta.

Comment 11

[Petruta Horea [:phorea]]

Verified as fixed on Firefox 144 beta 4 under Win 11 53-bit, mac OSX 15 and Ubuntu 24.

Comment 12

[Ryan VanderMeulen [:RyanVM]]

Comment on attachment 9513949 [details]
Bug 1989200 - Keep fxview details collapsible. r=#fxview-reviewers!

Approved for 143.0.3.

Comment 13

[Pulsebot]

https://github.com/mozilla-firefox/firefox/commit/5d279e61797f
https://hg.mozilla.org/releases/mozilla-release/rev/ffb23551bf5d

Comment 14

[Ryan VanderMeulen [:RyanVM]]

Added to the 143.0.3 relnotes.

Comment 15

[Petruta Horea [:phorea]]

Verified as fixed using Firefox 143.0.3 under Win 11, Ubuntu 24 and macOS 15.6.