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I have a ".desktop" file which opens Firefox.
I click the file and I see the mouse cursor icon is change to a "loading" icon, 
but firefox window doesn't appear.
The loading icon continues for a few seconds (about 10sec) and then the normal 
cursor icon is seen.

Overall, Firefox doesn't appear.
This issue started just recently, in the last week (probably due to an upgrade, 
I assume).
This issue happen only sometimes - meaning, sometimes when I click the 
".desktop" file then firefox starts normally, but in some other times then 
Firefox will not appear.

I performed some debug and found out the it is related to the gnome-shell 
program, or more specifically to the extension "ubuntu-dock".
By inspecting the file "/var/log/syslog", whenever the issue happens, then the 
following error appears in the file (omitted irrelevant data):
"
gnome-shell[2129]: JS ERROR: TypeError: window is 
undefined#012activateWindow@resource:///org/gnome/shell/ui/main.js:764:30#012IsolatedOverview@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/docking.js:1546:29#012_create/object[name]@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/utils.js:290:68#012launchNewWindow@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/appIcons.js:677:26#012activate@/usr/share/gnome-shell/extensions/ubuntu-d...@ubuntu.com/appIcons.js:615:18#012vfunc_clicked@resource:///org/gnome/shell/ui/appDisplay.js:3168:14
"

-----------------------------

Info according to the guidelines:

1)
$ lsb_release -rd
Description:    Ubuntu 22.04.1 LTS
Release:        22.04

2)
$ apt-cache policy "gnome-shell-extension-ubuntu-dock"
gnome-shell-extension-ubuntu-dock:
  Installed: 72~ubuntu5.22.04.1
  Candidate: 72~ubuntu5.22.04.1
  Version table:
 *** 72~ubuntu5.22.04.1 500
        500 http://il.archive.ubuntu.com/ubuntu jammy-updates/main amd64 
Packages
        500 http://il.archive.ubuntu.com/ubuntu jammy-updates/main i386 Packages
        100 /var/lib/dpkg/status
     72~ubuntu5 500
        500 http://il.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
        500 http://il.archive.ubuntu.com/ubuntu jammy/main i386 Packages

3)
I expected a Firefox window to appear.

4)
Instead, a Firefox window doesn't appear.

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: jammy
-- 
Firefox fails to start
https://bugs.launchpad.net/bugs/1995729
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