diff --git a/modules/editor-api/external/types/config.d.ts b/modules/editor-api/external/types/config.d.ts
index 80e6454eb..5a18b2e5d 100644
--- a/modules/editor-api/external/types/config.d.ts
+++ b/modules/editor-api/external/types/config.d.ts
@@ -231,5 +231,6 @@ export type LaunchConfig = {
     oneTrustDomainKey: string,
     schema: ModelSchema,
     engineVersions: EngineVersions,
-    wasmModules?: WasmModule[]
+    wasmModules?: WasmModule[],
+    signedUrls?: Record<string, string>
 };
diff --git a/src/launch/assets/assets-sync.ts b/src/launch/assets/assets-sync.ts
index 6b9361a97..5f246713d 100644
--- a/src/launch/assets/assets-sync.ts
+++ b/src/launch/assets/assets-sync.ts
@@ -94,13 +94,23 @@ editor.once('load', () => {
             if (assetData.file) {
                 if (concatenateScripts && assetData.type === 'script' && assetData.file.filename.endsWith('.js') && assetData.preload && !assetData.data.loadingType) {
                     assetData.file.url = concatenatedScriptsUrl;
+                } else if (config.signedUrls && config.signedUrls[assetData.id]) {
+                    // Use pre-signed CloudFront URL
+                    assetData.file.url = config.signedUrls[assetData.id];
+                    delete assetData.file.hash;
                 } else {
                     assetData.file.url = getFileUrl(assetData.path, assetData.id, assetData.revision, assetData.file.filename);
                 }
 
                 if (assetData.file.variants) {
                     for (key in assetData.file.variants) {
-                        assetData.file.variants[key].url = getFileUrl(assetData.path, assetData.id, assetData.revision, assetData.file.variants[key].filename);
+                        const variantSignedKey = `${assetData.id}:${key}`;
+                        if (config.signedUrls && config.signedUrls[variantSignedKey]) {
+                            assetData.file.variants[key].url = config.signedUrls[variantSignedKey];
+                            delete assetData.file.variants[key].hash;
+                        } else {
+                            assetData.file.variants[key].url = getFileUrl(assetData.path, assetData.id, assetData.revision, assetData.file.variants[key].filename);
+                        }
                     }
                 }
             }