See Mozilla bug #451007 - Reload page causing problems with
RealPlayer/Helix plugin.
We can potentially drop this patch since RealPlayer is no longer being
supported.

--- comm-esr31/mozilla/content/base/src/nsObjectLoadingContent.cpp.orig	2015-06-04 17:42:51.184423172 -0700
+++ comm-esr31/mozilla/content/base/src/nsObjectLoadingContent.cpp	2015-06-04 17:42:51.208745161 -0700
@@ -2744,7 +2744,8 @@
               bool aDelayedStop)
 {
   // Don't delay stopping QuickTime (bug 425157), Flip4Mac (bug 426524),
-  // XStandard (bug 430219), CMISS Zinc (bug 429604).
+  // XStandard (bug 430219), CMISS Zinc (bug 429604),
+  // RealPlayer/Helix (bug 451007).
   if (aDelayedStop
 #if !(defined XP_WIN || defined MOZ_X11)
       && !aInstanceOwner->MatchPluginName("QuickTime")
@@ -2752,6 +2753,8 @@
       && !aInstanceOwner->MatchPluginName("XStandard plugin")
       && !aInstanceOwner->MatchPluginName("CMISS Zinc Plugin")
 #endif
+      && !aInstanceOwner->MatchPluginName("RealPlayer")
+      && !aInstanceOwner->MatchPluginName("Helix")
       ) {
     nsCOMPtr<nsIRunnable> evt =
       new nsStopPluginRunnable(aInstanceOwner, aContent);