diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index bef763ea0..90b15a06a 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -13972,7 +13972,7 @@ interface URL {
     search: string;
     readonly searchParams: URLSearchParams;
     username: string;
-    toString(): string;
+    toJSON(): string;
 }
 
 declare var URL: {
@@ -13982,6 +13982,9 @@ declare var URL: {
     revokeObjectURL(url: string): void;
 };
 
+type webkitURL = URL;
+declare var webkitURL: typeof URL;
+
 interface URLSearchParams {
     /**
      * Appends a specified key/value pair as a new search parameter.
@@ -14007,11 +14010,13 @@ interface URLSearchParams {
      * Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
      */
     set(name: string, value: string): void;
+    sort(): void;
+    forEach(callbackfn: (value: string, key: string, parent: URLSearchParams) => void, thisArg?: any): void;
 }
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new (init?: string | URLSearchParams): URLSearchParams;
+    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
 };
 
 interface VRDisplay extends EventTarget {
diff --git a/baselines/webworker.generated.d.ts b/baselines/webworker.generated.d.ts
index aeb8267d7..78e2b5258 100644
--- a/baselines/webworker.generated.d.ts
+++ b/baselines/webworker.generated.d.ts
@@ -1452,7 +1452,7 @@ interface URL {
     search: string;
     readonly searchParams: URLSearchParams;
     username: string;
-    toString(): string;
+    toJSON(): string;
 }
 
 declare var URL: {
@@ -1487,11 +1487,13 @@ interface URLSearchParams {
      * Sets the value associated to a given search parameter to the given value. If there were several values, delete the others.
      */
     set(name: string, value: string): void;
+    sort(): void;
+    forEach(callbackfn: (value: string, key: string, parent: URLSearchParams) => void, thisArg?: any): void;
 }
 
 declare var URLSearchParams: {
     prototype: URLSearchParams;
-    new (init?: string | URLSearchParams): URLSearchParams;
+    new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
 };
 
 interface WebSocketEventMap {
diff --git a/inputfiles/addedTypes.json b/inputfiles/addedTypes.json
index f8ddd42cb..581e25bda 100644
--- a/inputfiles/addedTypes.json
+++ b/inputfiles/addedTypes.json
@@ -469,63 +469,14 @@
             },
             "URLSearchParams": {
                 "name": "URLSearchParams",
-                "methods": {
-                    "method": {
-                        "append": {
-                            "name": "append",
-                            "override-signatures": [
-                                "append(name: string, value: string): void"
-                            ]
-                        },
-                        "delete": {
-                            "name": "delete",
-                            "override-signatures": [
-                                "delete(name: string): void"
-                            ]
-                        },
-                        "get": {
-                            "name": "get",
-                            "override-signatures": [
-                                "get(name: string): string | null"
-                            ]
-                        },
-                        "getAll": {
-                            "name": "getAll",
-                            "override-signatures": [
-                                "getAll(name: string): string[]"
-                            ]
-                        },
-                        "has": {
-                            "name": "has",
-                            "override-signatures": [
-                                "has(name: string): boolean"
-                            ]
-                        },
-                        "set": {
-                            "name": "set",
-                            "override-signatures": [
-                                "set(name: string, value: string): void"
-                            ]
-                        }
-                    }
-                },
                 "constructor": {
                     "override-signatures": [
-                        "new (init?: string | URLSearchParams): URLSearchParams"
+                        "new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams"
                     ]
                 }
             },
             "URL": {
                 "name": "URL",
-                "properties": {
-                    "property": {
-                        "searchParams": {
-                            "name": "searchParams",
-                            "read-only": 1,
-                            "override-type": "URLSearchParams"
-                        }
-                    }
-                },
                 "methods": {
                     "method": {
                         "createObjectURL": {
diff --git a/inputfiles/idl/URL.widl b/inputfiles/idl/URL.widl
new file mode 100644
index 000000000..aefaa56cf
--- /dev/null
+++ b/inputfiles/idl/URL.widl
@@ -0,0 +1,35 @@
+[Constructor(USVString url, optional USVString base),
+ Exposed=(Window,Worker),
+ LegacyWindowAlias=webkitURL]
+interface URL {
+  stringifier attribute USVString href;
+  readonly attribute USVString origin;
+           attribute USVString protocol;
+           attribute USVString username;
+           attribute USVString password;
+           attribute USVString host;
+           attribute USVString hostname;
+           attribute USVString port;
+           attribute USVString pathname;
+           attribute USVString search;
+  [SameObject] readonly attribute URLSearchParams searchParams;
+           attribute USVString hash;
+
+  USVString toJSON();
+};
+
+[Constructor(optional (sequence<sequence<USVString>> or record<USVString, USVString> or USVString) init = ""),
+ Exposed=(Window,Worker)]
+interface URLSearchParams {
+  void append(USVString name, USVString value);
+  void delete(USVString name);
+  USVString? get(USVString name);
+  sequence<USVString> getAll(USVString name);
+  boolean has(USVString name);
+  void set(USVString name, USVString value);
+
+  void sort();
+
+  iterable<USVString, USVString>;
+  stringifier;
+};
diff --git a/inputfiles/idlSources.json b/inputfiles/idlSources.json
index 79ad3e897..93f9f2144 100644
--- a/inputfiles/idlSources.json
+++ b/inputfiles/idlSources.json
@@ -55,6 +55,10 @@
         "url": "https://w3c.github.io/touch-events/",
         "title": "Touch Events"
     },
+    {
+        "url": "https://url.spec.whatwg.org/",
+        "title": "URL"
+    },
     {
         "url": "https://www.w3.org/TR/user-timing-2/",
         "title": "User Timing"