tor-browser

commit 18958bfdef8b2452874467cd9889e468a1ff4f3b
parent d9af9be984bddd7956a6be5f5256869ca4375efe
Author: Daniel Minor <dminor@mozilla.com>
Date:   Fri, 12 Dec 2025 14:12:37 +0000

Bug 1994828 - Allow service workers to load wasm modules; r=dom-worker-reviewers,edenchuang

Differential Revision: https://phabricator.services.mozilla.com/D275510

Diffstat:
M
dom/workers/loader/NetworkLoadHandler.cpp
 | 
11
+++++++++--

1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/dom/workers/loader/NetworkLoadHandler.cpp b/dom/workers/loader/NetworkLoadHandler.cpp
@@ -341,8 +341,15 @@ nsresult NetworkLoadHandler::PrepareForRequest(nsIRequest* aRequest) {
     auto mimeTypeUTF16 = NS_ConvertUTF8toUTF16(mimeType);
     if (!nsContentUtils::IsJavascriptMIMEType(mimeTypeUTF16)) {
       // JSON is allowed as a non-toplevel.
-      if (loadContext->IsTopLevel() ||
-          !nsContentUtils::IsJsonMimeType(mimeTypeUTF16)) {
+      if (!((!loadContext->IsTopLevel() &&
+             nsContentUtils::IsJsonMimeType(mimeTypeUTF16))
+#ifdef NIGHTLY_BUILD
+            // Allow wasm modules.
+            || (StaticPrefs::
+                    javascript_options_experimental_wasm_esm_integration() &&
+                nsContentUtils::HasWasmMimeTypeEssence(mimeTypeUTF16))
+#endif
+                )) {
         const nsCString& scope = mWorkerRef->Private()
                                      ->GetServiceWorkerRegistrationDescriptor()
                                      .Scope();