Firefox Panel Icon Loads Swiftfox

[Heike C. Zimmerer]

Leonard Chatagnier <lenc5570 at sbcglobal.net> writes:

>> > ls -l $(firefox) loaded another 2 instances of
>> firefox
>> 
>> > Didn't know the the ls command could load a
>> program.???

It didn't. ls is not involved here.  $(firefox) as an argument means
to the shell: Start firefox and pass (after its exit) whatever text it
returned on stdout as argument to the ls command.

This is known as 'command substitution'.