diff --git a/dom/ipc/ContentParent.cpp b/dom/ipc/ContentParent.cpp
index fc073c8d1433..4124b0fddcfd 100644
--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -727,6 +727,11 @@ bool IsWebRemoteType(const nsAString& aContentProcessType) {
                           NS_LITERAL_STRING(DEFAULT_REMOTE_TYPE));
 }
 
+bool IsWebCoopCoepRemoteType(const nsAString& aContentProcessType) {
+  return StringBeginsWith(aContentProcessType,
+                          NS_LITERAL_STRING(WITH_COOP_COEP_REMOTE_TYPE_PREFIX));
+}
+
 /*static*/
 uint32_t ContentParent::GetMaxProcessCount(
     const nsAString& aContentProcessType) {
diff --git a/dom/ipc/ContentParent.h b/dom/ipc/ContentParent.h
index 1a698c9d229b..96948bee1ccf 100644
--- a/dom/ipc/ContentParent.h
+++ b/dom/ipc/ContentParent.h
@@ -1394,6 +1394,8 @@ const nsDependentSubstring RemoteTypePrefix(
 // This is based on isWebRemoteType in E10SUtils.jsm.
 bool IsWebRemoteType(const nsAString& aContentProcessType);
 
+bool IsWebCoopCoepRemoteType(const nsAString& aContentProcessType);
+
 }  // namespace dom
 }  // namespace mozilla