Save As dialog cannot receive focus

[yoones]

How to reproduce:
1. Open firefox
2. Ctrl+s

Expected behavior:
The "Save As" dialog opens. I can edit the file name, click on the left-side menu to change directory, click on the save button, close the dialog.

Bug:
The "Save As" dialog box is open. The "on mouse over" events work (elements are highlighted when the mouse is over) but clicking on any element has no effect. I cannot edit the filename, save the document, close the dialog box, ...
I can click on the "+" button of the main window and open a new tab, but the dialog box stays on top. When I have a tab open that plays a video or some music, the playing doesn't stop. Firefox doesn't seem to freeze, it just keeps this dialog box open on top.
I have to pkill firefox.

Additional information:
`wmctrl -l` lists multiple "Save as" windows.

My computer:
Dell XPS 15

My system:
$ lsb_release -rd
Description: Ubuntu 22.04.1 LTS
Release: 22.04

$ firefox --version
Mozilla Firefox 104.0.2

$ apt-cache policy firefox
firefox:
  Installed: (none)
  Candidate: 1:1snap1-0ubuntu2
  Version table:
     1:1snap1-0ubuntu2 500
        500 http://fr.archive.ubuntu.com/ubuntu jammy/main amd64 Packages

$ snap list
Name Version Rev Tracking Publisher Notes
bare 1.0 5 latest/stable canonical✓ base
chromium 105.0.5195.52 2076 latest/stable canonical✓ -
code e7f30e38 107 latest/stable vscode✓ classic
core 16-2.57.1 13741 latest/stable canonical✓ core
core18 20220831 2566 latest/stable canonical✓ base
core20 20220826 1623 latest/stable canonical✓ base
firefox 104.0.2-1 1810 latest/stable/… mozilla✓ -
gnome-3-38-2004 0+git.891e5bc 115 latest/stable/… canonical✓ -
gtk-common-themes 0.1-81-g442e511 1535 latest/stable/… canonical✓ -
helm 3.7.0 353 latest/stable snapcrafters classic
snap-store 41.3-63-gbd822db 592 latest/stable/… canonical✓ -
snapd 2.57.1 16778 latest/stable canonical✓ snapd
snapd-desktop-integration 0.1 14 latest/stable/… canonical✓ -

$ snap info firefox
name: firefox
summary: Mozilla Firefox web browser
publisher: Mozilla✓
store-url: https://snapcraft.io/firefox
contact: https://support.mozilla.org/kb/file-bug-report-or-feature-request-mozilla
license: unset
description: |
  Firefox is a powerful, extensible web browser with support for modern web application
  technologies.
commands:
  - firefox
  - firefox.geckodriver
snap-id: 3wdHCAVyZEmYsCMFDE9qt92UV8rC8Wdk
tracking: latest/stable/ubuntu-22.04
refresh-date: 8 days ago, at 00:27 CEST
channels:
  latest/stable: 104.0.2-1 2022-09-06 (1810) 185MB -
  latest/candidate: 105.0-1 2022-09-13 (1842) 187MB -
  latest/beta: 105.0b9-1 2022-09-12 (1836) 187MB -
  latest/edge: 106.0a1 2022-09-14 (1845) 192MB -
  esr/stable: 91.13.0esr-1 2022-09-02 (1791) 161MB -
  esr/candidate: 102.3.0esr-1 2022-09-12 (1839) 183MB -
  esr/beta: ↑
  esr/edge: 102.2.0esr-2 2022-09-02 (1793) 182MB -
installed: 104.0.2-1 (1810) 185MB -

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: evince 42.3-0ubuntu2
ProcVersionSignature: Ubuntu 5.15.0-47.51-generic 5.15.46
Uname: Linux 5.15.0-47-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Thu Sep 15 09:16:40 2022
InstallationDate: Installed on 2022-06-30 (76 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
SourcePackage: evince
UpgradeStatus: No upgrade log present (probably fresh install)

[Paul White (paulw2u)]

This bug has reported against evince, a document viewer, but Firefox seems to be the intended application so moving...