diff --git a/Cargo.lock b/Cargo.lock
index ec40b8813ba..ff09d540e3c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5240,7 +5240,7 @@ dependencies = [
 [[package]]
 name = "mozjs"
 version = "0.14.1"
-source = "git+https://github.com/servo/mozjs#b23161580b082e1ccfa3273d94f43f6168aedc3d"
+source = "git+https://github.com/servo/mozjs#4035b0c4e9e2df5cacc68c4b71e7375a48605902"
 dependencies = [
  "bindgen 0.71.1",
  "cc",
@@ -5251,8 +5251,8 @@ dependencies = [
 
 [[package]]
 name = "mozjs_sys"
-version = "0.128.13-2"
-source = "git+https://github.com/servo/mozjs#b23161580b082e1ccfa3273d94f43f6168aedc3d"
+version = "0.128.13-3"
+source = "git+https://github.com/servo/mozjs#4035b0c4e9e2df5cacc68c4b71e7375a48605902"
 dependencies = [
  "bindgen 0.71.1",
  "cc",
diff --git a/components/script/script_runtime.rs b/components/script/script_runtime.rs
index c054ae6afef..283aa9329f1 100644
--- a/components/script/script_runtime.rs
+++ b/components/script/script_runtime.rs
@@ -87,6 +87,7 @@ use crate::task_source::SendableTaskSource;
 static JOB_QUEUE_TRAPS: JobQueueTraps = JobQueueTraps {
     getIncumbentGlobal: Some(get_incumbent_global),
     enqueuePromiseJob: Some(enqueue_promise_job),
+    runJobs: Some(run_jobs),
     empty: Some(empty),
     pushNewInterruptQueue: Some(push_new_interrupt_queue),
     popInterruptQueue: Some(pop_interrupt_queue),
@@ -241,6 +242,17 @@ unsafe extern "C" fn get_incumbent_global(_: *const c_void, _: *mut RawJSContext
     result
 }
 
+#[allow(unsafe_code)]
+unsafe extern "C" fn run_jobs(microtask_queue: *const c_void, cx: *mut RawJSContext) {
+    let cx = JSContext::from_ptr(cx);
+    wrap_panic(&mut || {
+        let microtask_queue = &*(microtask_queue as *const MicrotaskQueue);
+        // TODO: run Promise- and User-variant Microtasks, and do #notify-about-rejected-promises.
+        // Those will require real `target_provider` and `globalscopes` values.
+        microtask_queue.checkpoint(cx, |_| None, vec![], CanGc::note());
+    });
+}
+
 #[allow(unsafe_code)]
 unsafe extern "C" fn empty(extra: *const c_void) -> bool {
     let mut result = false;