diff --git a/components/script/script_runtime.rs b/components/script/script_runtime.rs
index bc1f8f7e1bc..3f9cdf8a1bb 100644
--- a/components/script/script_runtime.rs
+++ b/components/script/script_runtime.rs
@@ -444,6 +444,7 @@ pub struct Runtime {
     rt: RustRuntime,
     pub microtask_queue: Rc<MicrotaskQueue>,
     job_queue: *mut JobQueue,
+    networking_task_src: Option<Box<NetworkingTaskSource>>,
 }
 
 impl Drop for Runtime {
@@ -561,12 +562,13 @@ unsafe fn new_rt_and_cx_with_parent(
         networking_task_src.queue_unconditionally(task).is_ok()
     }
 
+    let mut networking_task_src_ptr = std::ptr::null_mut();
     if let Some(source) = networking_task_source {
-        let networking_task_src = Box::new(source);
+        networking_task_src_ptr = Box::into_raw(Box::new(source));
         InitDispatchToEventLoop(
             cx,
             Some(dispatch_to_event_loop),
-            Box::into_raw(networking_task_src) as *mut c_void,
+            networking_task_src_ptr as *mut c_void,
         );
     }
 
@@ -721,6 +723,8 @@ unsafe fn new_rt_and_cx_with_parent(
         rt: runtime,
         microtask_queue,
         job_queue,
+        networking_task_src: (!networking_task_src_ptr.is_null())
+            .then(|| Box::from_raw(networking_task_src_ptr)),
     }
 }
 
diff --git a/support/suppressed_leaks_for_asan.txt b/support/suppressed_leaks_for_asan.txt
index 71647c0578f..70b895819e7 100644
--- a/support/suppressed_leaks_for_asan.txt
+++ b/support/suppressed_leaks_for_asan.txt
@@ -1,5 +1,11 @@
 # intentional Box::leak, introduced here: https://github.com/servo/stylo/blob/f4cde5d89d03db92d111eaa4b4b34e622b6eecac/style/sharing/mod.rs#L481
 leak:style::sharing::SHARING_CACHE_KEY::__init
+# intentional Box::leak, introduced here: https://github.com/servo/stylo/blob/80292f83789ec9d0c66f73ee7e6e142f7478d167/style/bloom.rs#L22
+leak:style::bloom::BLOOM_KEY::__init
 
 # std::sync::LazyLock never frees memory because it never runs destructors, see https://doc.rust-lang.org/std/sync/struct.LazyLock.html#examples
-leak:std::sync::LazyLock
\ No newline at end of file
+leak:std::sync::LazyLock
+
+# lazy_static never frees memory because it never runs destructors, see https://docs.rs/lazy_static/1.4.0/lazy_static/index.html#semantics
+# Needed because transitive dependency are still using it
+leak:lazy_static::lazy::Lazy*::get