C:\usr\local\share\PassThru\perl>"C:\Program Files\Mozilla Firefox\firefox.exe" --version

C:\usr\local\share\PassThru\perl>"C:\Program Files\Mozilla Firefox\firefox.exe" --version | perl -e "print $_ for <>"
Mozilla Firefox 61.0.2

C:\usr\local\share\PassThru\perl>"C:\Program Files\Mozilla Firefox\firefox.exe" --version > out.txt

C:\usr\local\share\PassThru\perl>type out.txt
Mozilla Firefox 61.0.2

##</code><code>##

C:\usr\local\share\PassThru\perl>perl -Mwarnings -Mstrict -e "my $cmd = q|C:\Program Files\Mozilla Firefox\firefox.exe|; open my $fh, '-|', $cmd, '--version' or die $!; my $out = do { local $/; <$fh> }; close $fh or die $! ? $! : qq(\$?=$?); print $out"
Mozilla Firefox 61.0.2