Download manager. Not part of build. a=asa

xpfe/components/download-manager/resources/content/downloadmanager.js

@@ -176,8 +176,20 @@ var downloadViewController = {
       file.launch();
       break;
     case "cmd_showinshell":
-      var file = getFileForItem(selection[0]);
-      file.reveal();
+      var localFile = getFileForItem(selection[0]);
+      
+      // on unix, open a browser window rooted at the parent
+      if (navigator.platform.indexOf("Win") == -1 && navigator.platform.indexOf("Mac") == -1) {
+        var file = localFile.QueryInterface(Components.interfaces.nsIFile);
+        var parent = file.parent;
+        if (parent) {
+          const browserURL = "chrome://navigator/content/navigator.xul";
+          window.openDialog(browserURL, "_blank", "chrome,all,dialog=no", parent.path);
+        }
+      }
+      else {
+        file.reveal();
+      }
       break;
     case "cmd_pause":
       break;