1823552 - Language dropdown on addons.mozilla.org changes size when scrolled

Status: VERIFIED FIXED

(Core :: Widget, defect)

Description

[Gregory Pappas [:gregp]]

Attachment: changes_size.webm

Steps to reproduce:

1. Navigate to https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/#lang-picker
2. Open the menu labeled "Change language"
3. Scroll the menu

Actual results:
Changes size

Expected results:
Does not change size

Comment 1

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

Set release status flags based on info from the regressing bug 1809084

:emilio, since you are the author of the regressor, bug 1809084, could you take a look? Also, could you set the severity field?

For more information, please visit auto_nag documentation.

Comment 2

[Alice0775 White]

I can also reproduce this on Windows10.
Screencast: https://youtu.be/EtrXJJQy4n4

Comment 5

[Emilio Cobos Álvarez [:emilio]]

Attachment: Bug 1823552 - When fixing the position of a followanchor="false" popup, don't lose the anchor rect altogether. r=dshin,stransky,#layout

Otherwise we lose the anchor constraints which can change our layout.
The only thing we want is to stop following the anchor node, so we can
just convert it to an anchor rect instead.

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/800f5495e4d6
When fixing the position of a followanchor="false" popup, don't lose the anchor rect altogether. r=stransky

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/93fa115838bb
Fix test_popup_moveToAnchor.xhtml failures by resetting offset on MoveTo calls.

Comment 8

[Noemi Erli[:noemi_erli]]

https://hg.mozilla.org/mozilla-central/rev/800f5495e4d6
https://hg.mozilla.org/mozilla-central/rev/93fa115838bb

Comment 9

[Ardelean Oana, Desktop Test Engineering [:oardelean]]

Reproducible on a 2023-03-20 Nightly build on Ubuntu 22.
Verified as fixed on Firefox 113.0b3(build ID: 20230412155147) and Nightly 114.0a1(build ID: 20230413035039) on Ubuntu 22, macOS 12, Windows 10.