diff -ur fvwm-2.5.30~/bin/fvwm-menu-headlines.in fvwm-2.5.30/bin/fvwm-menu-headlines.in
--- fvwm-2.5.30~/bin/fvwm-menu-headlines.in	2009-03-17 19:38:12.000000000 -0400
+++ fvwm-2.5.30/bin/fvwm-menu-headlines.in	2010-07-11 13:06:04.145477629 -0400
@@ -208,7 +208,7 @@
 my $name  = undef;
 my $title = undef;
 my $itemf = '%h\t%[(%Y-%m-%d %H:%M)]';
-my $execf = q(firefox '%u');
+my $execf = q(xdg-open '%u');
 my $commf = undef;
 my $icont = '';
 my $iconi = '';
Only in fvwm-2.5.30/bin: fvwm-menu-headlines.in~