Browser automatically setting GTK file chooser height to be extremely large

[matchatealeaf]

This issue happens with mullvad-browser-bin 14.0.7-1 installed from the AUR.

Opening GTK file chooser (for saving/opening files) on Linux systems that use xdg-desktop-portal-gtk crashes the browser if ran in Wayland with MOZ_ENABLE_WAYLAND=1.

The reason seems to be that the browser set the file chooser height to be extremely large.

Steps to reproduce:
1.) Check that the window-size for GTK file chooser is normal.

gsettings list-recursively | grep window-size             
org.gtk.Settings.FileChooser window-size (827, 535)
org.gtk.gtk4.Settings.FileChooser window-size (857, 522)

2.) Open mullvad-browser and press CTRL+O to invoke file chooser for opening of files, observes that mullvad-browser crashes.
3.) Check the window-size again to note the extremely large window height.

gsettings list-recursively | grep window-size
org.gtk.Settings.FileChooser window-size (827, 1283088)
org.gtk.gtk4.Settings.FileChooser window-size (857, 522)

This extremely large window height also caused other programs that uses GTK file chooser to crash (e.g., inkscape, firefox)

One can reset the window-size with gsettings reset org.gtk.Settings.FileChooser window-size, but mullvad-browser will still set it to the large height whenever the file chooser is invoked.

Here's the error message after crash:

[Parent 32501, Main Thread] WARNING: Native Windows taller than 65535 pixels are not supported: 'glib warning', file /var/tmp/build/firefox-64d9c39553ae/toolkit/xre/nsSigHandlers.cpp:187

(Mullvad Browser:32501): Gdk-WARNING **: 22:46:46.578: Native Windows taller than 65535 pixels are not supported
[Parent 32501, Main Thread] WARNING: ../gtk/gdk/wayland/gdkdisplay-wayland.c:1446: Unable to create Cairo image surface: invalid value (typically too big) for the size of the input (surface, pattern, etc.): 'glib warning', file /var/tmp/build/firefox-64d9c39553ae/toolkit/xre/nsSigHandlers.cpp:187

(Mullvad Browser:32501): Gdk-CRITICAL **: 22:46:46.596: ../gtk/gdk/wayland/gdkdisplay-wayland.c:1446: Unable to create Cairo image surface: invalid value (typically too big) for the size of the input (surface, pattern, etc.)
Exiting due to channel error.
Exiting due to channel error.
zsh: segmentation fault  mullvad-browser

Running in XWayland with XDG_BACKEND=x11 lead to an issue similar to #416 and #417 .

[Digitalone1]

Please, fix this issue. I had to downgrade to version 14.0.0 because every time the browser try to open the file dialog, it crashes.