--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -2910,26 +2910,24 @@ ContentParent::RecvAddNewProcess(const u
     // Resend pref updates to the forked child.
     for (size_t i = 0; i < numNuwaPrefUpdates; i++) {
         mozilla::unused << content->SendPreferenceUpdate(sNuwaPrefUpdates->ElementAt(i));
     }
 
     // Update offline settings.
     bool isOffline, isLangRTL;
     bool isConnected;
-    bool isSafeMode;
     InfallibleTArray<nsString> unusedDictionaries;
     ClipboardCapabilities clipboardCaps;
     DomainPolicyClone domainPolicy;
     OwningSerializedStructuredCloneBuffer initialData;
 
     RecvGetXPCOMProcessAttributes(&isOffline, &isConnected,
                                   &isLangRTL, &unusedDictionaries,
-                                  &clipboardCaps, &domainPolicy, &initialData,
-                                  &isSafeMode);
+                                  &clipboardCaps, &domainPolicy, &initialData);
     mozilla::unused << content->SendSetOffline(isOffline);
     mozilla::unused << content->SendSetConnectivity(isConnected);
     MOZ_ASSERT(!clipboardCaps.supportsSelectionClipboard() &&
                !clipboardCaps.supportsFindClipboard(),
                "Unexpected values");
 
     PreallocatedProcessManager::PublishSpareProcess(content);
     return true;