diff --git a/Libraries/LibIPC/Decoder.cpp b/Libraries/LibIPC/Decoder.cpp
index 85445722e4..a27168e253 100644
--- a/Libraries/LibIPC/Decoder.cpp
+++ b/Libraries/LibIPC/Decoder.cpp
@@ -136,8 +136,9 @@ ErrorOr<URL::Origin> decode(Decoder& decoder)
 {
     auto is_opaque = TRY(decoder.decode<bool>());
     if (is_opaque) {
-        auto nonce = TRY(decoder.decode<URL::Origin::Nonce>());
-        return URL::Origin { nonce };
+        auto nonce = TRY(decoder.decode<URL::Origin::OpaqueData::Nonce>());
+        auto type = TRY(decoder.decode<URL::Origin::OpaqueData::Type>());
+        return URL::Origin { URL::Origin::OpaqueData { nonce, type } };
     }
 
     auto scheme = TRY(decoder.decode<Optional<String>>());
diff --git a/Libraries/LibIPC/Encoder.cpp b/Libraries/LibIPC/Encoder.cpp
index aeb3772560..56f6f74cf4 100644
--- a/Libraries/LibIPC/Encoder.cpp
+++ b/Libraries/LibIPC/Encoder.cpp
@@ -149,7 +149,8 @@ ErrorOr<void> encode(Encoder& encoder, URL::Origin const& origin)
 {
     if (origin.is_opaque()) {
         TRY(encoder.encode(true));
-        TRY(encoder.encode(origin.nonce()));
+        TRY(encoder.encode(origin.opaque_data().nonce));
+        TRY(encoder.encode(origin.opaque_data().type));
     } else {
         TRY(encoder.encode(false));
         TRY(encoder.encode(origin.scheme()));
diff --git a/Libraries/LibURL/Origin.cpp b/Libraries/LibURL/Origin.cpp
index 80ef0094fb..725a485485 100644
--- a/Libraries/LibURL/Origin.cpp
+++ b/Libraries/LibURL/Origin.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024-2025, Shannon Booth <shannon@serenityos.org>
+ * Copyright (c) 2024-2026, Shannon Booth <shannon@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -11,9 +11,9 @@
 
 namespace URL {
 
-Origin Origin::create_opaque()
+Origin Origin::create_opaque(OpaqueData::Type type)
 {
-    return Origin { AK::get_random<Nonce>() };
+    return Origin { OpaqueData { get_random<OpaqueData::Nonce>(), type } };
 }
 
 // https://html.spec.whatwg.org/multipage/browsers.html#same-site
@@ -67,8 +67,8 @@ namespace AK {
 unsigned Traits<URL::Origin>::hash(URL::Origin const& origin)
 {
     if (origin.is_opaque()) {
-        auto const& nonce = origin.nonce();
-        // Random data, so the first u32 is as good as hashing the entire thing.
+        auto const& nonce = origin.opaque_data().nonce;
+        // Random data, so the first u32 of the nonce is as good as hashing the entire thing.
         return (static_cast<u32>(nonce[0]) << 24)
             | (static_cast<u32>(nonce[1]) << 16)
             | (static_cast<u32>(nonce[2]) << 8)
diff --git a/Libraries/LibURL/Origin.h b/Libraries/LibURL/Origin.h
index 6428f8b742..70cc40ef53 100644
--- a/Libraries/LibURL/Origin.h
+++ b/Libraries/LibURL/Origin.h
@@ -17,14 +17,23 @@ namespace URL {
 // https://html.spec.whatwg.org/multipage/browsers.html#concept-origin
 class Origin {
 public:
-    using Nonce = Array<u8, 16>;
+    struct OpaqueData {
+        enum class Type : u8 {
+            Standard,
+            File
+        };
+        using Nonce = Array<u8, 16>;
 
-    explicit Origin(Nonce nonce)
-        : m_state(move(nonce))
+        Nonce nonce;
+        Type type;
+    };
+
+    explicit Origin(OpaqueData opaque_data)
+        : m_state(opaque_data)
     {
     }
 
-    static Origin create_opaque();
+    static Origin create_opaque(OpaqueData::Type = OpaqueData::Type::Standard);
 
     Origin(Optional<String> const& scheme, Host const& host, Optional<u16> port, Optional<String> domain = {})
         : m_state(Tuple {
@@ -37,21 +46,21 @@ public:
     }
 
     // https://html.spec.whatwg.org/multipage/origin.html#concept-origin-opaque
-    bool is_opaque() const { return m_state.has<Nonce>(); }
+    bool is_opaque() const { return m_state.has<OpaqueData>(); }
 
     Optional<String> const& scheme() const { return m_state.get<Tuple>().scheme; }
     Host const& host() const { return m_state.get<Tuple>().host; }
     Optional<u16> port() const { return m_state.get<Tuple>().port; }
     Optional<String> domain() const { return m_state.get<Tuple>().domain; }
 
-    Nonce const& nonce() const { return m_state.get<Nonce>(); }
+    OpaqueData const& opaque_data() const { return m_state.get<OpaqueData>(); }
 
     // https://html.spec.whatwg.org/multipage/origin.html#same-origin
     bool is_same_origin(Origin const& other) const
     {
         // 1. If A and B are the same opaque origin, then return true.
         if (is_opaque() && other.is_opaque())
-            return nonce() == other.nonce();
+            return opaque_data().nonce == other.opaque_data().nonce;
 
         // 2. If A and B are both tuple origins and their schemes, hosts, and port are identical, then return true.
         if (!is_opaque() && !other.is_opaque()
@@ -70,7 +79,7 @@ public:
     {
         // 1. If A and B are the same opaque origin, then return true.
         if (is_opaque() && other.is_opaque())
-            return nonce() == other.nonce();
+            return opaque_data().nonce == other.opaque_data().nonce;
 
         // 2. If A and B are both tuple origins, run these substeps:
         if (!is_opaque() && !other.is_opaque()) {
@@ -110,7 +119,7 @@ public:
             return Host { tuple.domain.value() };
 
         // 3. Return origin's host.
-        return m_state.get<Tuple>().host;
+        return tuple.host;
     }
 
     bool operator==(Origin const& other) const { return is_same_origin(other); }
@@ -123,7 +132,7 @@ private:
         Optional<String> domain;
     };
 
-    Variant<Tuple, Nonce> m_state;
+    Variant<Tuple, OpaqueData> m_state;
 };
 
 }
diff --git a/Libraries/LibURL/Site.cpp b/Libraries/LibURL/Site.cpp
index d3985849e4..da8b2f9bf5 100644
--- a/Libraries/LibURL/Site.cpp
+++ b/Libraries/LibURL/Site.cpp
@@ -37,7 +37,7 @@ bool Site::is_same_site(Site const& other) const
     // 1. If A and B are the same opaque origin, then return true.
     // NOTE: Origins in sites are always opaque.
     if (m_value.has<Origin>() && other.m_value.has<Origin>())
-        return m_value.get<Origin>().nonce() == other.m_value.get<Origin>().nonce();
+        return m_value.get<Origin>().opaque_data().nonce == other.m_value.get<Origin>().opaque_data().nonce;
 
     // 2. If A or B is an opaque origin, then return false.
     if (m_value.has<Origin>() || other.m_value.has<Origin>())