Bug 675794 - about:config must trim whitespace from the name for a new alphanumeric; r=gavin.sharp f=margaret

toolkit/components/viewconfig/content/config.js

@@ -607,7 +607,12 @@ function NewPref(type)
                             gConfigBundle.getString("new_prompt"),
                             result,
                             null,
-                            dummy) && result.value) {
+                            dummy)) {
+    result.value = result.value.trim();
+    if (!result.value) {
+      return;
+    }
+
     var pref;
     if (result.value in gPrefHash)
       pref = gPrefHash[result.value];