--- a/security/sandbox/win/src/sandboxbroker/sandboxBroker.cpp
+++ b/security/sandbox/win/src/sandboxbroker/sandboxBroker.cpp
@@ -741,24 +741,19 @@ SandboxBroker::SetSecurityLevelForPlugin
 
   sandbox::MitigationFlags delayedMitigations =
     sandbox::MITIGATION_DLL_SEARCH_ORDER;
 
   result = mPolicy->SetDelayedProcessMitigations(delayedMitigations);
   SANDBOX_ENSURE_SUCCESS(result,
                          "Invalid flags for SetDelayedProcessMitigations.");
 
-#ifndef NIGHTLY_BUILD
-  // We are experimenting with using restricting SIDs in the nightly builds
-  mPolicy->SetDoNotUseRestrictingSIDs();
-#else
   // Add rule to allow read / write access to a special plugin temp dir.
   AddCachedDirRule(mPolicy, sandbox::TargetPolicy::FILES_ALLOW_ANY,
                    sPluginTempDir, NS_LITERAL_STRING("\\*"));
-#endif
 
   if (aSandboxLevel >= 2) {
     // Level 2 and above uses low integrity, so we need to give write access to
     // the Flash directories.
     AddCachedDirRule(mPolicy, sandbox::TargetPolicy::FILES_ALLOW_ANY,
                      sRoamingAppDataDir,
                      NS_LITERAL_STRING("\\Macromedia\\Flash Player\\*"));
     AddCachedDirRule(mPolicy, sandbox::TargetPolicy::FILES_ALLOW_ANY,