diff --git a/embedding/android/GeckoApp.java b/embedding/android/GeckoApp.java
index 42a731c952a1..7055efd38d6f 100644
--- a/embedding/android/GeckoApp.java
+++ b/embedding/android/GeckoApp.java
@@ -393,14 +393,17 @@ abstract public class GeckoApp
         // etc., and generally mark the profile as 'clean', and then
         // dirty it again if we get an onResume.
 
+
         GeckoAppShell.sendEventToGecko(new GeckoEvent(GeckoEvent.ACTIVITY_STOPPING));
         super.onStop();
+        GeckoAppShell.putChildInBackground();
     }
 
     @Override
     public void onRestart()
     {
         Log.i("GeckoApp", "restart");
+        GeckoAppShell.putChildInForeground();
         super.onRestart();
     }
 
diff --git a/embedding/android/GeckoAppShell.java b/embedding/android/GeckoAppShell.java
index 0a7638ade555..306adc4492c7 100644
--- a/embedding/android/GeckoAppShell.java
+++ b/embedding/android/GeckoAppShell.java
@@ -1165,6 +1165,52 @@ public class GeckoAppShell
         return result;
     }
 
+    public static void putChildInBackground() {
+        try {
+            File cgroupFile = new File("/proc" + android.os.Process.myPid() + "/cgroup");
+            BufferedReader br = new BufferedReader(new FileReader(cgroupFile));
+            String[] cpuLine = br.readLine().split("/");
+            br.close();
+            final String backgroundGroup = cpuLine.length == 2 ? cpuLine[1] : "";
+            GeckoProcessesVisitor visitor = new GeckoProcessesVisitor() {
+                public boolean callback(int pid) {
+                    if (pid != android.os.Process.myPid()) {
+                        try {
+                            FileOutputStream fos = new FileOutputStream(
+                                new File("/dev/cpuctl/" + backgroundGroup +"/tasks"));
+                            fos.write(new Integer(pid).toString().getBytes());
+                            fos.close();
+                        } catch(Exception e) {
+                            Log.e("GeckoAppShell", "error putting child in the background", e);
+                        }
+                    }
+                    return true;
+                }
+            };
+            EnumerateGeckoProcesses(visitor);
+        } catch (Exception e) {
+            Log.e("GeckoInputStream", "error reading cgroup", e);
+        }
+    }
+
+    public static void putChildInForeground() {
+        GeckoProcessesVisitor visitor = new GeckoProcessesVisitor() {
+            public boolean callback(int pid) {
+                if (pid != android.os.Process.myPid()) {
+                    try {
+                        FileOutputStream fos = new FileOutputStream(new File("/dev/cpuctl/tasks"));
+                        fos.write(new Integer(pid).toString().getBytes());
+                        fos.close();
+                    } catch(Exception e) {
+                        Log.e("GeckoAppShell", "error putting child in the foreground", e);
+                    }
+                }
+                return true;
+            }
+        };   
+        EnumerateGeckoProcesses(visitor);
+    }
+
     public static void killAnyZombies() {
         GeckoProcessesVisitor visitor = new GeckoProcessesVisitor() {
             public boolean callback(int pid) {