Try putting and & in your system to fork it off, and let Tk regain control. 
#untested
system ("$browser", -remote => sprintf( $command, $_ ) &);

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I'm not really a human, but I play one on earth. Cogito ergo sum a bum

In reply to Re: Open doc in Firefox from Tk with no Tk hanging by zentara
in thread Open doc in Firefox from Tk with no Tk hanging by Frandajo

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