diff --git a/docshell/base/nsDocShell.cpp b/docshell/base/nsDocShell.cpp
index 14d7b59aa9c..21edd991239 100644
--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@@ -6128,7 +6128,7 @@ already_AddRefed<nsIURI> nsDocShell::AttemptURIFixup(
 
 nsresult nsDocShell::FilterStatusForErrorPage(
     nsresult aStatus, nsIChannel* aChannel, uint32_t aLoadType,
-    bool aIsTopFrame, bool aUseErrorPages, bool aIsInitialDocument,
+    bool aIsTopFrame, bool aUseErrorPages,
     bool* aSkippedUnknownProtocolNavigation) {
   // Errors to be shown only on top-level frames
   if ((aStatus == NS_ERROR_UNKNOWN_HOST ||
@@ -6173,17 +6173,10 @@ nsresult nsDocShell::FilterStatusForErrorPage(
 
   if (aStatus == NS_ERROR_UNKNOWN_PROTOCOL) {
     // For unknown protocols we only display an error if the load is triggered
-    // by the browser itself, or we're replacing the initial document (and
-    // nothing else). Showing the error for page-triggered navigations causes
-    // annoying behavior for users, see bug 1528305.
-    //
-    // We could, maybe, try to detect if this is in response to some user
-    // interaction (like clicking a link, or something else) and maybe show
-    // the error page in that case. But this allows for ctrl+clicking and such
-    // to see the error page.
+    // by the browser itself. Showing the error for page-triggered navigations
+    // causes annoying behavior for users, see bug 1528305.
     nsCOMPtr<nsILoadInfo> info = aChannel->LoadInfo();
-    if (!info->TriggeringPrincipal()->IsSystemPrincipal() &&
-        !aIsInitialDocument) {
+    if (!info->TriggeringPrincipal()->IsSystemPrincipal()) {
       if (aSkippedUnknownProtocolNavigation) {
         *aSkippedUnknownProtocolNavigation = true;
       }
@@ -6333,12 +6326,9 @@ nsresult nsDocShell::EndPageLoad(nsIWebProgress* aProgress,
                                 aStatus == NS_ERROR_CONTENT_BLOCKED);
     UnblockEmbedderLoadEventForFailure(fireFrameErrorEvent);
 
-    bool isInitialDocument =
-        !GetExtantDocument() || GetExtantDocument()->IsInitialDocument();
     bool skippedUnknownProtocolNavigation = false;
     aStatus = FilterStatusForErrorPage(aStatus, aChannel, mLoadType, isTopFrame,
                                        mBrowsingContext->GetUseErrorPages(),
-                                       isInitialDocument,
                                        &skippedUnknownProtocolNavigation);
     hadErrorStatus = true;
     if (NS_FAILED(aStatus)) {
diff --git a/docshell/base/nsDocShell.h b/docshell/base/nsDocShell.h
index 0ea84df4dde..efc85bf17dc 100644
--- a/docshell/base/nsDocShell.h
+++ b/docshell/base/nsDocShell.h
@@ -457,7 +457,7 @@ class nsDocShell final : public nsDocLoader,
   // navigation.
   static nsresult FilterStatusForErrorPage(
       nsresult aStatus, nsIChannel* aChannel, uint32_t aLoadType,
-      bool aIsTopFrame, bool aUseErrorPages, bool aIsInitialDocument,
+      bool aIsTopFrame, bool aUseErrorPages,
       bool* aSkippedUnknownProtocolNavigation = nullptr);
 
   // Notify consumers of a search being loaded through the observer service:
diff --git a/netwerk/ipc/DocumentLoadListener.cpp b/netwerk/ipc/DocumentLoadListener.cpp
index ef946929c9b..630a033659c 100644
--- a/netwerk/ipc/DocumentLoadListener.cpp
+++ b/netwerk/ipc/DocumentLoadListener.cpp
@@ -177,10 +177,11 @@ static auto CreateDocumentLoadInfo(CanonicalBrowsingContext* aBrowsingContext,
 
 // Construct a LoadInfo object to use when creating the internal channel for an
 // Object/Embed load.
-static auto CreateObjectLoadInfo(
-    nsDocShellLoadState* aLoadState, uint64_t aInnerWindowId,
-    nsContentPolicyType aContentPolicyType,
-    uint32_t aSandboxFlags) -> already_AddRefed<LoadInfo> {
+static auto CreateObjectLoadInfo(nsDocShellLoadState* aLoadState,
+                                 uint64_t aInnerWindowId,
+                                 nsContentPolicyType aContentPolicyType,
+                                 uint32_t aSandboxFlags)
+    -> already_AddRefed<LoadInfo> {
   RefPtr<WindowGlobalParent> wgp =
       WindowGlobalParent::GetByInnerWindowId(aInnerWindowId);
   MOZ_RELEASE_ASSERT(wgp);
@@ -1022,8 +1023,8 @@ auto DocumentLoadListener::OpenObject(
     uint64_t aInnerWindowId, nsLoadFlags aLoadFlags,
     nsContentPolicyType aContentPolicyType, bool aUrgentStart,
     dom::ContentParent* aContentParent,
-    ObjectUpgradeHandler* aObjectUpgradeHandler,
-    nsresult* aRv) -> RefPtr<OpenPromise> {
+    ObjectUpgradeHandler* aObjectUpgradeHandler, nsresult* aRv)
+    -> RefPtr<OpenPromise> {
   LOG(("DocumentLoadListener [%p] OpenObject [uri=%s]", this,
        aLoadState->URI()->GetSpecOrDefault().get()));
 
@@ -1230,9 +1231,10 @@ void DocumentLoadListener::CleanupParentLoadAttempt(uint64_t aLoadIdent) {
   registrar->DeregisterChannels(aLoadIdent);
 }
 
-auto DocumentLoadListener::ClaimParentLoad(
-    DocumentLoadListener** aListener, uint64_t aLoadIdent,
-    Maybe<uint64_t> aChannelId) -> RefPtr<OpenPromise> {
+auto DocumentLoadListener::ClaimParentLoad(DocumentLoadListener** aListener,
+                                           uint64_t aLoadIdent,
+                                           Maybe<uint64_t> aChannelId)
+    -> RefPtr<OpenPromise> {
   nsCOMPtr<nsIRedirectChannelRegistrar> registrar =
       RedirectChannelRegistrar::GetOrCreate();
 
@@ -2364,15 +2366,9 @@ bool DocumentLoadListener::DocShellWillDisplayContent(nsresult aStatus) {
 
   auto* loadingContext = GetLoadingBrowsingContext();
 
-  bool isInitialDocument = true;
-  if (WindowGlobalParent* currentWindow =
-          loadingContext->GetCurrentWindowGlobal()) {
-    isInitialDocument = currentWindow->IsInitialDocument();
-  }
-
   nsresult rv = nsDocShell::FilterStatusForErrorPage(
       aStatus, mChannel, mLoadStateLoadType, loadingContext->IsTop(),
-      loadingContext->GetUseErrorPages(), isInitialDocument, nullptr);
+      loadingContext->GetUseErrorPages(), nullptr);
 
   if (NS_SUCCEEDED(rv)) {
     MOZ_LOG(gProcessIsolationLog, LogLevel::Verbose,