diff --git a/changelog.md b/changelog.md
index 811f4f3a26..6cef0a571e 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,7 +1,35 @@
 
 
+## Roll protocol to r1402790 — _2025-01-07T04:28:42.000Z_
+######  Diff: [`9d48b99...efa121f`](https://github.com/ChromeDevTools/devtools-protocol/compare/9d48b99...efa121f)
+
+```diff
+@@ browser_protocol.pdl:2327 @@ experimental domain CSS
+     returns
+       array of string results
+ 
++  experimental command getLonghandProperties
++    parameters
++      string shorthandName
++      string value
++    returns
++      array of CSSProperty longhandProperties
++
+   # Returns the styles defined inline (explicitly in the "style" attribute and implicitly, using DOM
+   # attributes) for a DOM node identified by `nodeId`.
+   command getInlineStylesForNode
+@@ -7429,6 +7436,7 @@ domain Network
+         InternalError
+         UnknownError
+         FulfilledLocally
++        SiteIssuerLimit
+       TrustTokenOperationType type
+       RequestId requestId
+       # Top level origin. The context in which the operation was attempted.
+```
+
 ## Roll protocol to r1402036 — _2025-01-04T04:28:29.000Z_
-######  Diff: [`1f97d3a...a10871b`](https://github.com/ChromeDevTools/devtools-protocol/compare/1f97d3a...a10871b)
+######  Diff: [`1f97d3a...9d48b99`](https://github.com/ChromeDevTools/devtools-protocol/compare/1f97d3a...9d48b99)
 
 ```diff
 @@ browser_protocol.pdl:7639 @@ domain Network
diff --git a/json/browser_protocol.json b/json/browser_protocol.json
index 4339a4e526..7d4131ede5 100644
--- a/json/browser_protocol.json
+++ b/json/browser_protocol.json
@@ -4837,6 +4837,29 @@
                         }
                     ]
                 },
+                {
+                    "name": "getLonghandProperties",
+                    "experimental": true,
+                    "parameters": [
+                        {
+                            "name": "shorthandName",
+                            "type": "string"
+                        },
+                        {
+                            "name": "value",
+                            "type": "string"
+                        }
+                    ],
+                    "returns": [
+                        {
+                            "name": "longhandProperties",
+                            "type": "array",
+                            "items": {
+                                "$ref": "CSSProperty"
+                            }
+                        }
+                    ]
+                },
                 {
                     "name": "getInlineStylesForNode",
                     "description": "Returns the styles defined inline (explicitly in the \"style\" attribute and implicitly, using DOM\nattributes) for a DOM node identified by `nodeId`.",
@@ -16052,7 +16075,8 @@
                                 "BadResponse",
                                 "InternalError",
                                 "UnknownError",
-                                "FulfilledLocally"
+                                "FulfilledLocally",
+                                "SiteIssuerLimit"
                             ]
                         },
                         {
diff --git a/package.json b/package.json
index 049a5cfb7e..3f2f961383 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "devtools-protocol",
-  "version": "0.0.1402036",
+  "version": "0.0.1402790",
   "description": "The Chrome DevTools Protocol JSON",
   "repository": "https://github.com/ChromeDevTools/devtools-protocol",
   "author": "The Chromium Authors",
diff --git a/pdl/browser_protocol.pdl b/pdl/browser_protocol.pdl
index 259fdcb9eb..d1f03de9eb 100644
--- a/pdl/browser_protocol.pdl
+++ b/pdl/browser_protocol.pdl
@@ -2327,6 +2327,13 @@ experimental domain CSS
     returns
       array of string results
 
+  experimental command getLonghandProperties
+    parameters
+      string shorthandName
+      string value
+    returns
+      array of CSSProperty longhandProperties
+
   # Returns the styles defined inline (explicitly in the "style" attribute and implicitly, using DOM
   # attributes) for a DOM node identified by `nodeId`.
   command getInlineStylesForNode
@@ -7429,6 +7436,7 @@ domain Network
         InternalError
         UnknownError
         FulfilledLocally
+        SiteIssuerLimit
       TrustTokenOperationType type
       RequestId requestId
       # Top level origin. The context in which the operation was attempted.
diff --git a/types/protocol-mapping.d.ts b/types/protocol-mapping.d.ts
index a0809219e3..7a1567681c 100644
--- a/types/protocol-mapping.d.ts
+++ b/types/protocol-mapping.d.ts
@@ -1835,6 +1835,10 @@ export namespace ProtocolMapping {
             paramsType: [Protocol.CSS.ResolveValuesRequest];
             returnType: Protocol.CSS.ResolveValuesResponse;
         };
+        'CSS.getLonghandProperties': {
+            paramsType: [Protocol.CSS.GetLonghandPropertiesRequest];
+            returnType: Protocol.CSS.GetLonghandPropertiesResponse;
+        };
         /**
          * Returns the styles defined inline (explicitly in the "style" attribute and implicitly, using DOM
          * attributes) for a DOM node identified by `nodeId`.
diff --git a/types/protocol-proxy-api.d.ts b/types/protocol-proxy-api.d.ts
index 82e214de40..239fe9714a 100644
--- a/types/protocol-proxy-api.d.ts
+++ b/types/protocol-proxy-api.d.ts
@@ -1074,6 +1074,8 @@ export namespace ProtocolProxyApi {
          */
         resolveValues(params: Protocol.CSS.ResolveValuesRequest): Promise<Protocol.CSS.ResolveValuesResponse>;
 
+        getLonghandProperties(params: Protocol.CSS.GetLonghandPropertiesRequest): Promise<Protocol.CSS.GetLonghandPropertiesResponse>;
+
         /**
          * Returns the styles defined inline (explicitly in the "style" attribute and implicitly, using DOM
          * attributes) for a DOM node identified by `nodeId`.
diff --git a/types/protocol-tests-proxy-api.d.ts b/types/protocol-tests-proxy-api.d.ts
index 175f090276..e4cfb13723 100644
--- a/types/protocol-tests-proxy-api.d.ts
+++ b/types/protocol-tests-proxy-api.d.ts
@@ -1142,6 +1142,8 @@ export namespace ProtocolTestsProxyApi {
          */
         resolveValues(params: Protocol.CSS.ResolveValuesRequest): Promise<{id: number, result: Protocol.CSS.ResolveValuesResponse, sessionId: string}>;
 
+        getLonghandProperties(params: Protocol.CSS.GetLonghandPropertiesRequest): Promise<{id: number, result: Protocol.CSS.GetLonghandPropertiesResponse, sessionId: string}>;
+
         /**
          * Returns the styles defined inline (explicitly in the "style" attribute and implicitly, using DOM
          * attributes) for a DOM node identified by `nodeId`.
diff --git a/types/protocol.d.ts b/types/protocol.d.ts
index d8e0c863ae..a059531ce3 100644
--- a/types/protocol.d.ts
+++ b/types/protocol.d.ts
@@ -5564,6 +5564,15 @@ export namespace Protocol {
             results: string[];
         }
 
+        export interface GetLonghandPropertiesRequest {
+            shorthandName: string;
+            value: string;
+        }
+
+        export interface GetLonghandPropertiesResponse {
+            longhandProperties: CSSProperty[];
+        }
+
         export interface GetInlineStylesForNodeRequest {
             nodeId: DOM.NodeId;
         }
@@ -12703,6 +12712,7 @@ export namespace Protocol {
             InternalError = 'InternalError',
             UnknownError = 'UnknownError',
             FulfilledLocally = 'FulfilledLocally',
+            SiteIssuerLimit = 'SiteIssuerLimit',
         }
 
         /**
@@ -12718,7 +12728,7 @@ export namespace Protocol {
              * of the operation already exists und thus, the operation was abort
              * preemptively (e.g. a cache hit). (TrustTokenOperationDoneEventStatus enum)
              */
-            status: ('Ok' | 'InvalidArgument' | 'MissingIssuerKeys' | 'FailedPrecondition' | 'ResourceExhausted' | 'AlreadyExists' | 'ResourceLimited' | 'Unauthorized' | 'BadResponse' | 'InternalError' | 'UnknownError' | 'FulfilledLocally');
+            status: ('Ok' | 'InvalidArgument' | 'MissingIssuerKeys' | 'FailedPrecondition' | 'ResourceExhausted' | 'AlreadyExists' | 'ResourceLimited' | 'Unauthorized' | 'BadResponse' | 'InternalError' | 'UnknownError' | 'FulfilledLocally' | 'SiteIssuerLimit');
             type: TrustTokenOperationType;
             requestId: RequestId;
             /**