August 2, 2020 18:09
For this use
kdocker - install it from apt…
Command for e.g. Thunderbird would be (with 20 seconds wait for the window - good for HDD based systems):
kdocker -q -i /usr/share/icons/Papirus-Dark/48x48/apps/thunderbird.svg -d 20 thunderbird
If you the above to the startup, you now have a good email program always in background available!