2005152 - 2nd level bookmarks dropdown popup opens out of screen

Status: UNCONFIRMED

(Core :: Widget: Gtk, defect, P3)

Description

[[e-mail]]

Attachment: Screenshot From 2025-12-10 09-22-01.png

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:146.0) Gecko/20100101 Firefox/146.0

Steps to reproduce:

click on 'Bookmarks' > dropdown list opens
click on a folder in the list > the folder opens
click on a 2nd level folder in the folder > the dropdown menu opens out of screen
...

Actual results:

click on a 2nd level folder in the folder > the dropdown menu opens out of screen
see attached screenshot
... clicking again usually the dropdown menu opens correctly IN the screen

Expected results:

click on a 2nd level folder in the folder > the dropdown menu should open IN the screen
Ubuntu 26.04 Wayland session Google

Comment 1

[[e-mail]]

Same problem with Firefox Nightly 148.0a1 (2025-12-10) (64-bit)

Comment 2

[BugBot [:suhaib / :marco]]

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

Comment 3

[Martin Stránský [:stransky] (ni? me)]

Is that a recent regression? Have you seen it before?
Thanks.

Comment 4

[Martin Stránský [:stransky] (ni? me)]

Please attach your about:support page.
Thanks.

Comment 5

[[e-mail]]

Attachment: Firefox about:support as requested

Comment 6

[[e-mail]]

NOT a recent regression I've been seeing the problem for at least a week

Comment 7

[[e-mail]]

Attachment: Raw data from about:support

Comment 8

[Martin Stránský [:stransky] (ni? me)]

Can you use mozregression to find broken commit?
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems#Use_Mozregression_tool
Thanks.

Comment 9

[[e-mail]]

Sorry, i'm using Ubuntu 26.04 with Firefox snap 146.0 and i don't know mozregression.
On another partition I have also Ubuntu 26.04 with Firefox nightly.

Comment 10

[Thinker Li [:sinker]]

Could you provide a log with the following command?

env MOZ_LOG="timestamp,WidgetPopup:5,WidgetScreen:5" MOZ_LOG_FILE="popup" firefox

This command will start firefox turning on some log flags. A log file popup.moz_log will be create. Please attach it here.
Please keep the test as short as possible, just enough to reproduce the issue.
Please also record the desktop during the test if possible.

Comment 11

[[e-mail]]

I'm unable to reproduce the problem (tested 5 times) if firefox is started with your command while the problem still appear sometimes wiyh firefox started normally.
thanks

Comment 12

[[e-mail]]

Attachment: popup.moz_log

Comment 13

[[e-mail]]

I was able to reproduce the problem

Comment 14

[Kestrel]

(In reply to [e-mail] from comment #9)

i'm using Ubuntu 26.04 with Firefox snap 146.0

I have been unable to reproduce this on Ubuntu 26.04, 25.10 or 24.04LTS with version 146 (100% scale single display). The snap is based on 24.04LTS so it should be unrelated to using 26.04. It looks similar to Bug 2006820 but that only started in version 148 and should not be affecting version 146.