1898379 - [Linux] Occasionally cannot drag/drop tabs

Status: RESOLVED WORKSFORME

(Core :: Widget: Gtk, defect)

Description

[Valentin Nuikin]

Attachment: firefox_tabs_bug.mp4

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:126.0) Gecko/20100101 Firefox/126.0

Steps to reproduce:

Repeating these actions makes browser tabs not draggable:

• open Firefox full-screen
• open 3 new tabs (tabs are still draggable)
• detach 1 tab to new window
• while have that new window focused
• try to click and detach from 1-st unfocused window, 1-st unfocused tab
• after this tabs are not draggable anymore
• restarting browser - helps temporary
• see attached video

What I tried:

• browser.tabs.allowTabDetach - is true
• disabling all extension - not helps
• safe mode - not helps
• restarting browser - helps temporary
• switch to esr/stable 115.11.0esr-1 version - helps
• can't reproduce same bug on windows

I'm using:

• Firefox 126.0-2
• User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:126.0) Gecko/20100101 Firefox/126.0
• Build: 20240510023632
• OS: Linux 6.5.0-35-generic #35~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue May 7 09:00:52 UTC 2
• Ubuntu 22.04.2 LTS
• GNOME 42.9
• have 2 screens
• Firefox installed with snap latest/stable channel
• Bug started appearing after updating from version 125 to 126.0-2

Here is my stdout with safe-mode (nothing new appears when drag breaks):

firefox --safe-mode
Gtk-Message: 23:00:09.791: Not loading module "atk-bridge": The functionality is provided by GTK natively. Please try to not load it.
[67624, Main Thread] WARNING: GTK+ module /snap/firefox/4259/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded.
GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported.: 'glib warning', file /build/firefox/parts/firefox/build/toolkit/xre/nsSigHandlers.cpp:187

(firefox:67624): Gtk-WARNING **: 23:00:09.832: GTK+ module /snap/firefox/4259/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded.
GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported.
Gtk-Message: 23:00:09.832: Failed to load module "canberra-gtk-module"
[67624, Main Thread] WARNING: GTK+ module /snap/firefox/4259/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded.
GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported.: 'glib warning', file /build/firefox/parts/firefox/build/toolkit/xre/nsSigHandlers.cpp:187

(firefox:67624): Gtk-WARNING **: 23:00:09.833: GTK+ module /snap/firefox/4259/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded.
GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported.
Gtk-Message: 23:00:09.833: Failed to load module "canberra-gtk-module"
[GFX1-]: RenderCompositorSWGL failed mapping default framebuffer, no dt

Actual results:

Browser tabs become not draggable and detachable

Expected results:

Browser tabs still draggable and detachable

Comment 1

[Valentin Nuikin]

Attachment: about_support.json

Here is my about:support

Comment 2

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

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)]

Can you please test latest nightly? We landed various D&D fixes recently:
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems#Testing_Mozilla_binaries
Thanks.

Comment 4

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

Better link to test Nightly:
https://fedoraproject.org/wiki/How_to_debug_Firefox_problems#Testing_Mozilla_Nightly_binaries

Comment 5

[Valentin Nuikin]

Thanks for your reply.
I tried nightly build from snap latest/edge channel

• version: 128.0a1
• build: 20240523044707

Bug is fixed in it.
Thanks!

Comment 6

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

Thanks.