User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:97.0) Gecko/20100101 Firefox/97.0

Steps to reproduce:

Firefox Developer Edition crashed when I drag & drop a tab to change position of tab.

1. Open several tabs
2. Drag a tab you to another position and drop it.
3. Try to drag a tab again. It doesn't matter which tab you choose.

I confirmed:

• It reproduced even if I created a new profile.
• The thumbnail and the floating tab bar are not displayed on the second drag.
• I could change the position of the tab by using Ctrl+Shift+PageUp/PageDown.

Environment:

• Version: Firefox Developer Edition 97.0b6 (64 bit)
  • Package: firefox-developer-edition-97.0b6-1
• Language: Japanese
• OS: Arch Linux / Linux 5.16.2-arch1-1
• X11: xorg-server 21.1.3
• Window Manager: i3, Openbox

Actual results:

Firefox suddenly crashed with following error:

(firefoxdeveloperedition:8241): Gdk-WARNING **: 11:18:01.716: The program 'firefoxdeveloperedition' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadWindow (invalid Window parameter)'.
  (Details: serial 8532 error_code 3 request_code 129 (SHAPE) minor_code 2)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the GDK_SYNCHRONIZE environment
   variable to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.

Expected results:

I expect that a position tab is changed to another position.

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

This issue was solved after I update packages.

• Version: Firefox Developer Edition 97.0b9 (64 bit)
  • Package: firefox-developer-edition-97.0b9-1
• OS: Arch Linux / Linux 5.16.3-arch1-1

I confirmed this does not reproduce in Firefox 96.0.2. (Arch Linux package: firefox-96.0.2-1)

Thanks for testing!