diff --git a/components/style/values/generics/transform.rs b/components/style/values/generics/transform.rs
index d452b215c6a..42a5197311f 100644
--- a/components/style/values/generics/transform.rs
+++ b/components/style/values/generics/transform.rs
@@ -23,8 +23,10 @@ use style_traits::{CssWriter, ToCss};
     Clone,
     Copy,
     Debug,
+    Deserialize,
     MallocSizeOf,
     PartialEq,
+    Serialize,
     SpecifiedValueInfo,
     ToComputedValue,
     ToCss,
@@ -51,8 +53,10 @@ pub use self::GenericMatrix as Matrix;
     Clone,
     Copy,
     Debug,
+    Deserialize,
     MallocSizeOf,
     PartialEq,
+    Serialize,
     SpecifiedValueInfo,
     ToComputedValue,
     ToCss,
@@ -141,8 +145,10 @@ fn is_same<N: PartialEq>(x: &N, y: &N) -> bool {
 #[derive(
     Clone,
     Debug,
+    Deserialize,
     MallocSizeOf,
     PartialEq,
+    Serialize,
     SpecifiedValueInfo,
     ToComputedValue,
     ToCss,
@@ -267,8 +273,10 @@ pub use self::GenericTransformOperation as TransformOperation;
 #[derive(
     Clone,
     Debug,
+    Deserialize,
     MallocSizeOf,
     PartialEq,
+    Serialize,
     SpecifiedValueInfo,
     ToComputedValue,
     ToCss,
diff --git a/components/style_traits/owned_slice.rs b/components/style_traits/owned_slice.rs
index 33d3ac1c2ab..bbce7065196 100644
--- a/components/style_traits/owned_slice.rs
+++ b/components/style_traits/owned_slice.rs
@@ -7,6 +7,8 @@
 //! A replacement for `Box<[T]>` that cbindgen can understand.
 
 use malloc_size_of::{MallocShallowSizeOf, MallocSizeOf, MallocSizeOfOps};
+use serde::de::{Deserialize, Deserializer};
+use serde::ser::{Serialize, Serializer};
 use std::marker::PhantomData;
 use std::ops::{Deref, DerefMut};
 use std::ptr::NonNull;
@@ -171,3 +173,22 @@ impl<T> iter::FromIterator<T> for OwnedSlice<T> {
         Vec::from_iter(iter).into()
     }
 }
+
+impl<T: Serialize> Serialize for OwnedSlice<T> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        self.deref().serialize(serializer)
+    }
+}
+
+impl<'de, T: Deserialize<'de>> Deserialize<'de> for OwnedSlice<T> {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let r = Box::<[T]>::deserialize(deserializer)?;
+        Ok(r.into())
+    }
+}