diff --git a/Cargo.lock b/Cargo.lock
index 979e4754356..ebfe3ad34f8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1617,7 +1617,7 @@ dependencies = [
 [[package]]
 name = "dom"
 version = "0.0.1"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "bitflags 2.6.0",
  "malloc_size_of",
@@ -4247,7 +4247,7 @@ dependencies = [
 [[package]]
 name = "malloc_size_of"
 version = "0.0.1"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "app_units",
  "cssparser",
@@ -6196,7 +6196,7 @@ dependencies = [
 [[package]]
 name = "selectors"
 version = "0.26.0"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "bitflags 2.6.0",
  "cssparser",
@@ -6484,7 +6484,7 @@ dependencies = [
 [[package]]
 name = "servo_arc"
 version = "0.4.0"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "serde",
  "stable_deref_trait",
@@ -6493,7 +6493,7 @@ dependencies = [
 [[package]]
 name = "servo_atoms"
 version = "0.0.1"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "string_cache",
  "string_cache_codegen",
@@ -6866,7 +6866,7 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 [[package]]
 name = "static_prefs"
 version = "0.1.0"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 
 [[package]]
 name = "strck"
@@ -6925,7 +6925,7 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 [[package]]
 name = "style"
 version = "0.0.1"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "app_units",
  "arrayvec",
@@ -6983,7 +6983,7 @@ dependencies = [
 [[package]]
 name = "style_config"
 version = "0.0.1"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "lazy_static",
 ]
@@ -6991,7 +6991,7 @@ dependencies = [
 [[package]]
 name = "style_derive"
 version = "0.0.1"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "darling",
  "proc-macro2",
@@ -7021,7 +7021,7 @@ dependencies = [
 [[package]]
 name = "style_traits"
 version = "0.0.1"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "app_units",
  "bitflags 2.6.0",
@@ -7384,7 +7384,7 @@ dependencies = [
 [[package]]
 name = "to_shmem"
 version = "0.1.0"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "cssparser",
  "servo_arc",
@@ -7397,7 +7397,7 @@ dependencies = [
 [[package]]
 name = "to_shmem_derive"
 version = "0.1.0"
-source = "git+https://github.com/servo/stylo?branch=2024-11-01#16c1b6858581ab837f04a30cc5bc762ca1cbad23"
+source = "git+https://github.com/servo/stylo?branch=2024-11-01#18ca509a7dcfc0f175cddb36b57bc4cd9586f81e"
 dependencies = [
  "darling",
  "proc-macro2",
diff --git a/components/layout_thread/lib.rs b/components/layout_thread/lib.rs
index 51e07a9c044..674ef2520b5 100644
--- a/components/layout_thread/lib.rs
+++ b/components/layout_thread/lib.rs
@@ -81,7 +81,7 @@ use style::context::{
 use style::dom::{OpaqueNode, ShowSubtree, ShowSubtreeDataAndPrimaryValues, TElement, TNode};
 use style::driver;
 use style::error_reporting::RustLogReporter;
-use style::global_style_data::{GLOBAL_STYLE_DATA, STYLE_THREAD_POOL};
+use style::global_style_data::GLOBAL_STYLE_DATA;
 use style::invalidation::element::restyle_hints::RestyleHint;
 use style::logical_geometry::LogicalPoint;
 use style::media_queries::{Device, MediaList, MediaType};
@@ -109,6 +109,14 @@ use webrender_api::units::DevicePixel;
 use webrender_api::{units, ColorF, HitTestFlags};
 use webrender_traits::CrossProcessCompositorApi;
 
+// This mutex is necessary due to syncronisation issues between two different types of thread-local storage
+// which manifest themselves when the layout thread tries to layout iframes in parallel with the main page
+//
+// See: https://github.com/servo/servo/pull/29792
+// And: https://gist.github.com/mukilan/ed57eb61b83237a05fbf6360ec5e33b0
+static STYLE_THREAD_POOL: Mutex<&style::global_style_data::STYLE_THREAD_POOL> =
+    Mutex::new(&style::global_style_data::STYLE_THREAD_POOL);
+
 /// Information needed by layout.
 pub struct LayoutThread {
     /// The ID of the pipeline that we belong to.
diff --git a/components/layout_thread_2020/lib.rs b/components/layout_thread_2020/lib.rs
index 1a4d284b112..5e0415c05e0 100644
--- a/components/layout_thread_2020/lib.rs
+++ b/components/layout_thread_2020/lib.rs
@@ -68,7 +68,7 @@ use style::context::{
 use style::dom::{OpaqueNode, TElement, TNode};
 use style::error_reporting::RustLogReporter;
 use style::font_metrics::FontMetrics;
-use style::global_style_data::{GLOBAL_STYLE_DATA, STYLE_THREAD_POOL};
+use style::global_style_data::GLOBAL_STYLE_DATA;
 use style::invalidation::element::restyle_hints::RestyleHint;
 use style::media_queries::{Device, MediaList, MediaType};
 use style::properties::style_structs::Font;
@@ -94,6 +94,14 @@ use webrender_api::units::{DevicePixel, LayoutPixel};
 use webrender_api::{units, ExternalScrollId, HitTestFlags};
 use webrender_traits::CrossProcessCompositorApi;
 
+// This mutex is necessary due to syncronisation issues between two different types of thread-local storage
+// which manifest themselves when the layout thread tries to layout iframes in parallel with the main page
+//
+// See: https://github.com/servo/servo/pull/29792
+// And: https://gist.github.com/mukilan/ed57eb61b83237a05fbf6360ec5e33b0
+static STYLE_THREAD_POOL: Mutex<&style::global_style_data::STYLE_THREAD_POOL> =
+    Mutex::new(&style::global_style_data::STYLE_THREAD_POOL);
+
 /// Information needed by layout.
 pub struct LayoutThread {
     /// The ID of the pipeline that we belong to.
@@ -796,7 +804,7 @@ impl LayoutThread {
 
         self.stylist.flush(&guards, Some(root_element), Some(&map));
 
-        let rayon_pool = STYLE_THREAD_POOL.lock().unwrap();
+        let rayon_pool = STYLE_THREAD_POOL.lock();
         let rayon_pool = rayon_pool.pool();
         let rayon_pool = rayon_pool.as_ref();