Thanks for your suggestion. The '-|", LIST pipe seems not working on Windows. My script should be able to execute seamlessly between Linux and Windows. Instead when I use the STRING pipe, as mentioned here: https://www.perlmonks.org/bare/?node_id=902198, it again breaks splitting on the space: 'C:\Program' is not recognized as an internal or external command, operable program or batch file. 

my $cmd = 'C:\Program Files\Mozilla Firefox\firefox.exe --version';
chomp($cmd);
open my $fh2, "$cmd|" or die $!;
my $out = do { local $/; <$fh2> };  # slurp
close $fh2 or die $! ? $! : "\$?=$?";
chomp $out;

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In reply to Re^2: Execute command with spaces in perl by naveenp5
in thread Execute command with spaces in perl by naveenp5

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