diff --git a/js/src/xpconnect/src/xpccomponents.cpp b/js/src/xpconnect/src/xpccomponents.cpp
index b0480a4b5578..a7c30e915ae4 100644
--- a/js/src/xpconnect/src/xpccomponents.cpp
+++ b/js/src/xpconnect/src/xpccomponents.cpp
@@ -3412,6 +3412,7 @@ ContextHolder::ContextHolder(JSContext *aOuterCx, JSObject *aSandbox)
     {
         JSAutoRequest ar(mJSContext);
         JS_SetOptions(mJSContext,
+                      JS_GetOptions(mJSContext) |
                       JSOPTION_DONT_REPORT_UNCAUGHT |
                       JSOPTION_PRIVATE_IS_NSISUPPORTS);
         JS_SetGlobalObject(mJSContext, aSandbox);