I took Brian's recommendation and created a file in ~/.local/share/applications called sandfox.desktop. Contents of that file are:

[Desktop Entry]
Encoding=UTF-8
Type=Application
Icon=/home/steve/Pictures/firejailed_firefox128.png
Exec=/usr/bin/firejail --apparmor firefox
Name=Sandboxed Web Browser
Terminal=false

I have it set to executable but when i try to run it "./sandfox.desktop" I get the error:
./sandfox.desktop: line 1: [Desktop: command not found
./sandfox.desktop: line 5: --apparmor: command not found
./sandfox.desktop: line 6: Web: command not found

Is my file misconfigured or what do I not have correct?



On Fri, Dec 25, 2020 at 5:47 PM Brian Cluff via PLUG-discuss <plug-discuss@lists.phxlinux.org> wrote:
Under debian based distros, overriding an overwrite of ANY installed file is easily done.
There's a really cool tool called dpkg-divert that the system uses to take whatever files would normally be installed and steer them into a different place so that you can put your own version of the file in the same place without fear of it going away on the next update.

Just do:
dpkg-divert --add --rename /usr/share/applications/firefox.desktop

In this case, that would be the overkill and less correct way of handing the problem.  A better way would be to put your own version of the firefox.desktop into certain directories and that cause it to override the system version of the config.  Put them in ~/.local/share/applications/ to change an individual user and /usr/local/share/applications/ to effect every user on the system.

Brian Cluff