Index: src/org/openstreetmap/josm/tools/PlatformHookUnixoid.java
===================================================================
--- src/org/openstreetmap/josm/tools/PlatformHookUnixoid.java	(revision 3652)
+++ src/org/openstreetmap/josm/tools/PlatformHookUnixoid.java	(working copy)
@@ -17,7 +17,7 @@ public class PlatformHookUnixoid impleme
     public void startupHook() {
     }
     public void openUrl(String url) throws IOException {
-        String[] programs = {"gnome-open", "kfmclient openURL", "firefox"};
+        String[] programs = {"xdg-open", "gnome-open", "kfmclient openURL", "firefox"};
         for (String program : programs) {
             try {
                 Runtime.getRuntime().exec(program+" "+url);