From: Wolfgang Rosenauer

Subject: NonGnome/KDE integration

References:

https://bugzilla.novell.com/show_bug.cgi?id=170055

Caveats: desktop file name of Firefox is hardcoded to MozillaFirefox

--- mozilla/browser/base/content/nsContextMenu.js.fix16	2012-07-29 01:21:31.000000000 +0400

+++ mozilla/browser/base/content/nsContextMenu.js	2012-07-29 01:23:23.000000000 +0400

@@ -265,9 +265,11 @@ nsContextMenu.prototype = {

     var haveSetDesktopBackground = false;

 #ifdef HAVE_SHELL_SERVICE

     // Only enable Set as Desktop Background if we can get the shell service.

     var shell = getShellService();

-    if (shell)

+    var env = Components.classes["@mozilla.org/process/environment;1"]

+                        .getService(Components.interfaces.nsIEnvironment);

+    if (shell && env.get('DESKTOP_SESSION') == "gnome")

       haveSetDesktopBackground = shell.canSetDesktopBackground;

 #endif

     this.showItem("context-setDesktopBackground",

                   haveSetDesktopBackground && this.onLoadedImage);