--- a/js/src/proxy/CrossCompartmentWrapper.cpp
+++ b/js/src/proxy/CrossCompartmentWrapper.cpp
@@ -538,16 +538,22 @@ js::NukeCrossCompartmentWrappers(JSConte
             // interested in those.
             const CrossCompartmentKey& k = e.front().key();
             if (!k.is<JSObject*>())
                 continue;
 
             AutoWrapperRooter wobj(cx, WrapperValue(e));
             JSObject* wrapped = UncheckedUnwrap(wobj);
 
+            // We never nuke script source objects, since only ever used internally by the JS
+            // engine, and are expected to remain valid throughout a scripts lifetime.
+            if (MOZ_UNLIKELY(wrapped->is<ScriptSourceObject>())) {
+                continue;
+            }
+
             // We only skip nuking window references that point to a target
             // compartment, not the ones that belong to it.
             if (nukeReferencesToWindow == DontNukeWindowReferences &&
                 MOZ_LIKELY(!nukeAll) && IsWindowProxy(wrapped))
             {
                 continue;
             }