--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -723,16 +723,21 @@ const nsDependentSubstring RemoteTypePre
   return StringHead(aContentProcessType, equalIdx);
 }
 
 bool IsWebRemoteType(const nsAString& aContentProcessType) {
   return StringBeginsWith(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) {
   // Max process count is based only on the prefix.
   const nsDependentSubstring processTypePrefix =
       RemoteTypePrefix(aContentProcessType);
 
   // Check for the default remote type of "web", as it uses different prefs.

--- a/dom/ipc/ContentParent.h
+++ b/dom/ipc/ContentParent.h
@@ -1393,16 +1393,18 @@ NS_DEFINE_STATIC_IID_ACCESSOR(ContentPar
 
 // This is the C++ version of remoteTypePrefix in E10SUtils.jsm.
 const nsDependentSubstring RemoteTypePrefix(
     const nsAString& aContentProcessType);
 
 // This is based on isWebRemoteType in E10SUtils.jsm.
 bool IsWebRemoteType(const nsAString& aContentProcessType);
 
+bool IsWebCoopCoepRemoteType(const nsAString& aContentProcessType);
+
 }  // namespace dom
 }  // namespace mozilla
 
 class ParentIdleListener : public nsIObserver {
   friend class mozilla::dom::ContentParent;
 
  public:
   NS_DECL_ISUPPORTS