diff --git a/dom/media/webrtc/transport/ipc/WebrtcTCPSocket.cpp b/dom/media/webrtc/transport/ipc/WebrtcTCPSocket.cpp
index eb933d59eb0d..b0a7d37a0e0b 100644
--- a/dom/media/webrtc/transport/ipc/WebrtcTCPSocket.cpp
+++ b/dom/media/webrtc/transport/ipc/WebrtcTCPSocket.cpp
@@ -471,7 +471,7 @@ nsresult WebrtcTCPSocket::OpenWithHttpProxy() {
     return rv;
   }
 
-  rv = NS_MaybeOpenChannelUsingAsyncOpen(httpChannel, this);
+  rv = httpChannel->AsyncOpen(this);
 
   if (NS_FAILED(rv)) {
     LOG(("WebrtcTCPSocket %p: cannot async open\n", this));
diff --git a/dom/webbrowserpersist/nsWebBrowserPersist.cpp b/dom/webbrowserpersist/nsWebBrowserPersist.cpp
index cf50bd512a34..eac9681f2ccf 100644
--- a/dom/webbrowserpersist/nsWebBrowserPersist.cpp
+++ b/dom/webbrowserpersist/nsWebBrowserPersist.cpp
@@ -1469,8 +1469,7 @@ nsresult nsWebBrowserPersist::SaveChannelInternal(nsIChannel* aChannel,
 
   if (fc && !fu) {
     nsCOMPtr<nsIInputStream> fileInputStream, bufferedInputStream;
-    nsresult rv =
-        NS_MaybeOpenChannelUsingOpen(aChannel, getter_AddRefs(fileInputStream));
+    nsresult rv = aChannel->Open(getter_AddRefs(fileInputStream));
     NS_ENSURE_SUCCESS(rv, rv);
     rv = NS_NewBufferedInputStream(getter_AddRefs(bufferedInputStream),
                                    fileInputStream.forget(),
@@ -1488,7 +1487,7 @@ nsresult nsWebBrowserPersist::SaveChannelInternal(nsIChannel* aChannel,
   }
 
   // Read from the input channel
-  nsresult rv = NS_MaybeOpenChannelUsingAsyncOpen(aChannel, this);
+  nsresult rv = aChannel->AsyncOpen(this);
   if (rv == NS_ERROR_NO_CONTENT) {
     // Assume this is a protocol such as mailto: which does not feed out
     // data and just ignore it.
diff --git a/js/xpconnect/loader/mozJSModuleLoader.cpp b/js/xpconnect/loader/mozJSModuleLoader.cpp
index 29469f1a119d..8b0b88664b6e 100644
--- a/js/xpconnect/loader/mozJSModuleLoader.cpp
+++ b/js/xpconnect/loader/mozJSModuleLoader.cpp
@@ -794,8 +794,7 @@ static mozilla::Result<nsCString, nsresult> ReadScript(
   MOZ_TRY(aInfo.EnsureScriptChannel());
 
   nsCOMPtr<nsIInputStream> scriptStream;
-  MOZ_TRY(NS_MaybeOpenChannelUsingOpen(aInfo.ScriptChannel(),
-                                       getter_AddRefs(scriptStream)));
+  MOZ_TRY(aInfo.ScriptChannel()->Open(getter_AddRefs(scriptStream)));
 
   uint64_t len64;
   uint32_t bytesRead;
diff --git a/modules/libjar/zipwriter/nsZipWriter.cpp b/modules/libjar/zipwriter/nsZipWriter.cpp
index 0a965871f26c..43c890a7ea06 100644
--- a/modules/libjar/zipwriter/nsZipWriter.cpp
+++ b/modules/libjar/zipwriter/nsZipWriter.cpp
@@ -378,8 +378,7 @@ NS_IMETHODIMP nsZipWriter::AddEntryChannel(const nsACString& aZipEntry,
   if (mEntryHash.Get(aZipEntry, nullptr)) return NS_ERROR_FILE_ALREADY_EXISTS;
 
   nsCOMPtr<nsIInputStream> inputStream;
-  nsresult rv =
-      NS_MaybeOpenChannelUsingOpen(aChannel, getter_AddRefs(inputStream));
+  nsresult rv = aChannel->Open(getter_AddRefs(inputStream));
 
   NS_ENSURE_SUCCESS(rv, rv);
 
@@ -934,7 +933,7 @@ inline nsresult nsZipWriter::BeginProcessingAddition(nsZipQueueItem* aItem,
       rv = pump->AsyncRead(stream);
       NS_ENSURE_SUCCESS(rv, rv);
     } else {
-      rv = NS_MaybeOpenChannelUsingAsyncOpen(aItem->mChannel, stream);
+      rv = aItem->mChannel->AsyncOpen(stream);
       NS_ENSURE_SUCCESS(rv, rv);
     }
 
diff --git a/netwerk/base/nsNetUtil.cpp b/netwerk/base/nsNetUtil.cpp
index 249a200ce3be..fcb887140094 100644
--- a/netwerk/base/nsNetUtil.cpp
+++ b/netwerk/base/nsNetUtil.cpp
@@ -1057,7 +1057,7 @@ nsresult NS_ImplementChannelOpen(nsIChannel* channel, nsIInputStream** result) {
                                          getter_AddRefs(stream));
   NS_ENSURE_SUCCESS(rv, rv);
 
-  rv = NS_MaybeOpenChannelUsingAsyncOpen(channel, listener);
+  rv = channel->AsyncOpen(listener);
   NS_ENSURE_SUCCESS(rv, rv);
 
   uint64_t n;
@@ -2592,18 +2592,6 @@ nsresult NS_LinkRedirectChannels(uint64_t channelId,
   return registrar->LinkChannels(channelId, parentChannel, _result);
 }
 
-nsresult NS_MaybeOpenChannelUsingOpen(nsIChannel* aChannel,
-                                      nsIInputStream** aStream) {
-  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
-  return aChannel->Open(aStream);
-}
-
-nsresult NS_MaybeOpenChannelUsingAsyncOpen(nsIChannel* aChannel,
-                                           nsIStreamListener* aListener) {
-  nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
-  return aChannel->AsyncOpen(aListener);
-}
-
 nsILoadInfo::CrossOriginEmbedderPolicy
 NS_GetCrossOriginEmbedderPolicyFromHeader(
     const nsACString& aHeader, bool aIsOriginTrialCoepCredentiallessEnabled) {
diff --git a/netwerk/base/nsNetUtil.h b/netwerk/base/nsNetUtil.h
index ce51e399e6ca..fc8c8f39fba2 100644
--- a/netwerk/base/nsNetUtil.h
+++ b/netwerk/base/nsNetUtil.h
@@ -811,22 +811,6 @@ nsresult NS_LinkRedirectChannels(uint64_t channelId,
                                  nsIParentChannel* parentChannel,
                                  nsIChannel** _result);
 
-/**
- * Helper function which checks whether the channel can be
- * openend using Open() or has to fall back to opening
- * the channel using Open().
- */
-nsresult NS_MaybeOpenChannelUsingOpen(nsIChannel* aChannel,
-                                      nsIInputStream** aStream);
-
-/**
- * Helper function which checks whether the channel can be
- * openend using AsyncOpen() or has to fall back to opening
- * the channel using AsyncOpen().
- */
-nsresult NS_MaybeOpenChannelUsingAsyncOpen(nsIChannel* aChannel,
-                                           nsIStreamListener* aListener);
-
 /**
  * Returns nsILoadInfo::EMBEDDER_POLICY_REQUIRE_CORP if `aHeader` is
  * "require-corp" and nsILoadInfo::EMBEDDER_POLICY_NULL otherwise.
diff --git a/netwerk/protocol/about/nsAboutCache.cpp b/netwerk/protocol/about/nsAboutCache.cpp
index c0303d786333..1873277a7a68 100644
--- a/netwerk/protocol/about/nsAboutCache.cpp
+++ b/netwerk/protocol/about/nsAboutCache.cpp
@@ -118,7 +118,7 @@ NS_IMETHODIMP nsAboutCache::Channel::AsyncOpen(nsIStreamListener* aListener) {
   rv = VisitNextStorage();
   if (NS_FAILED(rv)) return rv;
 
-  rv = NS_MaybeOpenChannelUsingAsyncOpen(mChannel, aListener);
+  rv = mChannel->AsyncOpen(aListener);
   if (NS_FAILED(rv)) return rv;
 
   return NS_OK;
diff --git a/netwerk/protocol/websocket/WebSocketChannel.cpp b/netwerk/protocol/websocket/WebSocketChannel.cpp
index 119baaeaa488..4ff3dc81ba99 100644
--- a/netwerk/protocol/websocket/WebSocketChannel.cpp
+++ b/netwerk/protocol/websocket/WebSocketChannel.cpp
@@ -1350,7 +1350,7 @@ void WebSocketChannel::BeginOpenInternal() {
     return;
   }
 
-  rv = NS_MaybeOpenChannelUsingAsyncOpen(localChannel, this);
+  rv = localChannel->AsyncOpen(this);
 
   if (NS_FAILED(rv)) {
     LOG(("WebSocketChannel::BeginOpenInternal: cannot async open\n"));