--- a/ipc/glue/GeckoChildProcessHost.cpp
+++ b/ipc/glue/GeckoChildProcessHost.cpp
@@ -1239,18 +1239,16 @@ GeckoExistingProcessHost::~GeckoExisting
   // will happen.
   SetAlreadyDead();
 }
 
 bool
 GeckoExistingProcessHost::PerformAsyncLaunch(StringVector aExtraOpts,
                                              base::ProcessArchitecture aArch)
 {
-  SetHandle(mExistingProcessHandle);
-
   OpenPrivilegedHandle(base::GetProcId(mExistingProcessHandle));
 
   MonitorAutoLock lock(mMonitor);
   mProcessState = PROCESS_CREATED;
   lock.Notify();
 
   return true;
 }