Index: u_main.tk
===================================================================
RCS file: /cvsroot/pure-data/pd/src/u_main.tk,v
retrieving revision 1.25
diff -u -w -r1.25 u_main.tk
--- u_main.tk	9 Oct 2006 04:36:12 -0000	1.25
+++ u_main.tk	10 Oct 2007 05:12:38 -0000
@@ -386,9 +386,16 @@
     global pd_nt         
 
     if {$pd_nt == 0} {
-        exec sh -c \
-            [format "firefox file:%s || mozilla file:%s " \
-                $filename $filename] &
+        foreach candidate \
+            { gnome-open xdg-open sensible-browser iceweasel firefox mozilla \
+              galeon konqueror netscape lynx } {
+                  set browser [lindex [auto_execok $candidate] 0]
+                  if {[string length $browser]} {
+                         puts stderr [format "%s %s" $browser $filename]
+                         exec -- sh -c [format "%s %s" $browser $filename] &
+                         break
+                     }
+                 }
     } elseif {$pd_nt == 2} {
         puts stderr [format "open %s" $filename]
             exec sh -c [format "open %s" $filename]