diff --git a/js/loader/ScriptFetchOptions.h b/js/loader/ScriptFetchOptions.h
index 844527da1ca1..4b0ad12256cf 100644
--- a/js/loader/ScriptFetchOptions.h
+++ b/js/loader/ScriptFetchOptions.h
@@ -86,6 +86,21 @@ class ScriptFetchOptions {
    *  TODO: Move to ScriptLoadContext
    */
   nsCOMPtr<nsIPrincipal> mTriggeringPrincipal;
+
+  // Returns true if given fetch option is compatible with this fetch option
+  // in term of sharing the server response.
+  inline bool IsCompatible(ScriptFetchOptions* other) {
+    bool equals;
+    (void)mTriggeringPrincipal->Equals(other->mTriggeringPrincipal, &equals);
+
+    if (!equals) {
+      return false;
+    }
+
+    // NOTE: mParserMetadata can be ignored.
+    return mCORSMode == other->mCORSMode && mNonce == other->mNonce &&
+           mFetchPriority == other->mFetchPriority;
+  }
 };
 
 }  // namespace JS::loader
diff --git a/js/loader/ScriptLoadRequest.cpp b/js/loader/ScriptLoadRequest.cpp
index 918c16460ece..22c7e655675d 100644
--- a/js/loader/ScriptLoadRequest.cpp
+++ b/js/loader/ScriptLoadRequest.cpp
@@ -173,6 +173,29 @@ bool ScriptLoadRequest::IsCacheable() const {
   return mExpirationTime > now;
 }
 
+void ScriptLoadRequest::CacheEntryFound(LoadedScript* aLoadedScript) {
+  MOZ_ASSERT(IsCheckingCache());
+  MOZ_ASSERT(mURI);
+
+  mLoadedScript = aLoadedScript;
+
+  MOZ_ASSERT(mFetchOptions->IsCompatible(mLoadedScript->GetFetchOptions()));
+
+  switch (mKind) {
+    case ScriptKind::eClassic:
+    case ScriptKind::eImportMap:
+      MOZ_ASSERT(mLoadedScript->IsClassicScript());
+      break;
+    case ScriptKind::eModule:
+      MOZ_ASSERT(mLoadedScript->IsModuleScript());
+      break;
+    case ScriptKind::eEvent:
+      MOZ_ASSERT_UNREACHABLE("EventScripts are not using ScriptLoadRequest");
+      break;
+  }
+  mState = State::Ready;
+}
+
 void ScriptLoadRequest::NoCacheEntryFound() {
   MOZ_ASSERT(IsCheckingCache());
   MOZ_ASSERT(mURI);
diff --git a/js/loader/ScriptLoadRequest.h b/js/loader/ScriptLoadRequest.h
index 237ad47ed568..82ac700cfcd5 100644
--- a/js/loader/ScriptLoadRequest.h
+++ b/js/loader/ScriptLoadRequest.h
@@ -7,6 +7,7 @@
 #ifndef js_loader_ScriptLoadRequest_h
 #define js_loader_ScriptLoadRequest_h
 
+#include "js/experimental/JSStencil.h"
 #include "js/RootingAPI.h"
 #include "js/SourceText.h"
 #include "js/TypeDecls.h"
@@ -189,6 +190,10 @@ class ScriptLoadRequest : public nsISupports,
     return mFetchOptions->mTriggeringPrincipal;
   }
 
+  // Convert a CheckingCache ScriptLoadRequest into a Ready one, by populating
+  // the script data from cached script.
+  void CacheEntryFound(LoadedScript* aLoadedScript);
+
   // Convert a CheckingCache ScriptLoadRequest into a Fetching one, by creating
   // a new LoadedScript which is matching the ScriptKind provided when
   // constructing this ScriptLoadRequest.