diff --git a/.api-reports/api-report-core.api.md b/.api-reports/api-report-core.api.md
index 815cb7391a..5382952aee 100644
--- a/.api-reports/api-report-core.api.md
+++ b/.api-reports/api-report-core.api.md
@@ -1866,7 +1866,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -2142,6 +2142,7 @@ export type SubscribeToMoreOptions<TData = any, TSubscriptionVariables = Operati
 export interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -2302,9 +2303,9 @@ interface WriteContext extends ReadMergeModifyContext {
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 // src/link/http/selectHttpOptionsAndBody.ts:128:32 - (ae-forgotten-export) The symbol "HttpQueryOptions" needs to be exported by the entry point index.d.ts
 
 // (No @packageDocumentation comment for this package)
diff --git a/.api-reports/api-report-react.api.md b/.api-reports/api-report-react.api.md
index 32dd9f8010..0e32289572 100644
--- a/.api-reports/api-report-react.api.md
+++ b/.api-reports/api-report-react.api.md
@@ -392,6 +392,7 @@ export interface BaseSubscriptionOptions<TData = any, TVariables extends Operati
     context?: Context;
     // Warning: (ae-forgotten-export) The symbol "ErrorPolicy" needs to be exported by the entry point index.d.ts
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     // Warning: (ae-forgotten-export) The symbol "FetchPolicy" needs to be exported by the entry point index.d.ts
     fetchPolicy?: FetchPolicy;
     ignoreResults?: boolean;
@@ -1647,7 +1648,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -1948,6 +1949,7 @@ export interface SubscriptionHookOptions<TData = any, TVariables extends Operati
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: Context;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -2324,11 +2326,11 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:38:3 - (ae-forgotten-export) The symbol "SubscribeToMoreFunction" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:54:3 - (ae-forgotten-export) The symbol "FetchMoreFunction" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:78:4 - (ae-forgotten-export) The symbol "RefetchFunction" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react_components.api.md b/.api-reports/api-report-react_components.api.md
index a1e25d6977..e8ed84f1de 100644
--- a/.api-reports/api-report-react_components.api.md
+++ b/.api-reports/api-report-react_components.api.md
@@ -340,6 +340,7 @@ interface BaseSubscriptionOptions<TData = any, TVariables extends OperationVaria
     context?: DefaultContext;
     // Warning: (ae-forgotten-export) The symbol "ErrorPolicy" needs to be exported by the entry point index.d.ts
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     // Warning: (ae-forgotten-export) The symbol "FetchPolicy" needs to be exported by the entry point index.d.ts
     fetchPolicy?: FetchPolicy;
     ignoreResults?: boolean;
@@ -1461,7 +1462,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -1696,6 +1697,7 @@ export interface SubscriptionComponentOptions<TData = any, TVariables extends Op
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -1803,11 +1805,11 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 
 // (No @packageDocumentation comment for this package)
 
diff --git a/.api-reports/api-report-react_context.api.md b/.api-reports/api-report-react_context.api.md
index 4c0c8a8991..6f255e1efa 100644
--- a/.api-reports/api-report-react_context.api.md
+++ b/.api-reports/api-report-react_context.api.md
@@ -1390,7 +1390,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -1626,6 +1626,7 @@ type SubscribeToMoreOptions<TData = any, TSubscriptionVariables = OperationVaria
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -1724,11 +1725,11 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 
 // (No @packageDocumentation comment for this package)
 
diff --git a/.api-reports/api-report-react_hoc.api.md b/.api-reports/api-report-react_hoc.api.md
index ad7a5bf8b4..7b8cdd3f2f 100644
--- a/.api-reports/api-report-react_hoc.api.md
+++ b/.api-reports/api-report-react_hoc.api.md
@@ -1435,7 +1435,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -1632,6 +1632,7 @@ type SubscribeToMoreOptions<TData = any, TSubscriptionVariables = OperationVaria
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -1753,11 +1754,11 @@ export function withSubscription<TProps extends TGraphQLVariables | {} = {}, TDa
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 
 // (No @packageDocumentation comment for this package)
 
diff --git a/.api-reports/api-report-react_hooks.api.md b/.api-reports/api-report-react_hooks.api.md
index 2137e1da77..6c8829f614 100644
--- a/.api-reports/api-report-react_hooks.api.md
+++ b/.api-reports/api-report-react_hooks.api.md
@@ -363,6 +363,7 @@ interface BaseSubscriptionOptions<TData = any, TVariables extends OperationVaria
     context?: DefaultContext;
     // Warning: (ae-forgotten-export) The symbol "ErrorPolicy" needs to be exported by the entry point index.d.ts
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     // Warning: (ae-forgotten-export) The symbol "FetchPolicy" needs to be exported by the entry point index.d.ts
     fetchPolicy?: FetchPolicy;
     ignoreResults?: boolean;
@@ -1516,7 +1517,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -1770,6 +1771,7 @@ interface SubscriptionHookOptions<TData = any, TVariables extends OperationVaria
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -2148,11 +2150,11 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:38:3 - (ae-forgotten-export) The symbol "SubscribeToMoreFunction" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:54:3 - (ae-forgotten-export) The symbol "FetchMoreFunction" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:78:4 - (ae-forgotten-export) The symbol "RefetchFunction" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react_internal.api.md b/.api-reports/api-report-react_internal.api.md
index 993f35c561..934334ea9b 100644
--- a/.api-reports/api-report-react_internal.api.md
+++ b/.api-reports/api-report-react_internal.api.md
@@ -1568,7 +1568,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -1815,6 +1815,7 @@ type SubscribeToMoreOptions<TData = any, TSubscriptionVariables = OperationVaria
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -2212,11 +2213,11 @@ export function wrapQueryRef<TData, TVariables extends OperationVariables>(inter
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:38:3 - (ae-forgotten-export) The symbol "SubscribeToMoreFunction" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:54:3 - (ae-forgotten-export) The symbol "FetchMoreFunction" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:78:4 - (ae-forgotten-export) The symbol "RefetchFunction" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report-react_ssr.api.md b/.api-reports/api-report-react_ssr.api.md
index 6db286b108..c547e86923 100644
--- a/.api-reports/api-report-react_ssr.api.md
+++ b/.api-reports/api-report-react_ssr.api.md
@@ -1375,7 +1375,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -1611,6 +1611,7 @@ type SubscribeToMoreOptions<TData = any, TSubscriptionVariables = OperationVaria
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -1709,11 +1710,11 @@ interface WatchQueryOptions<TVariables extends OperationVariables = OperationVar
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 
 // (No @packageDocumentation comment for this package)
 
diff --git a/.api-reports/api-report-testing.api.md b/.api-reports/api-report-testing.api.md
index 170a8acc43..2d72d09c0a 100644
--- a/.api-reports/api-report-testing.api.md
+++ b/.api-reports/api-report-testing.api.md
@@ -1456,7 +1456,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -1661,6 +1661,7 @@ type SubscribeToMoreOptions<TData = any, TSubscriptionVariables = OperationVaria
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -1779,11 +1780,11 @@ export function withWarningSpy<TArgs extends any[], TResult>(it: (...args: TArgs
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 
 // (No @packageDocumentation comment for this package)
 
diff --git a/.api-reports/api-report-testing_core.api.md b/.api-reports/api-report-testing_core.api.md
index aacf32eccc..ddf2c0aa6c 100644
--- a/.api-reports/api-report-testing_core.api.md
+++ b/.api-reports/api-report-testing_core.api.md
@@ -1413,7 +1413,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -1618,6 +1618,7 @@ type SubscribeToMoreOptions<TData = any, TSubscriptionVariables = OperationVaria
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -1736,11 +1737,11 @@ export function withWarningSpy<TArgs extends any[], TResult>(it: (...args: TArgs
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 
 // (No @packageDocumentation comment for this package)
 
diff --git a/.api-reports/api-report-utilities.api.md b/.api-reports/api-report-utilities.api.md
index 8dc5e2982b..ea225f4f7e 100644
--- a/.api-reports/api-report-utilities.api.md
+++ b/.api-reports/api-report-utilities.api.md
@@ -2177,7 +2177,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -2478,6 +2478,7 @@ type SubscribeToMoreOptions<TData = any, TSubscriptionVariables = OperationVaria
 interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -2667,11 +2668,11 @@ interface WriteContext extends ReadMergeModifyContext {
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:174:3 - (ae-forgotten-export) The symbol "MutationQueryReducer" needs to be exported by the entry point index.d.ts
 // src/core/types.ts:203:5 - (ae-forgotten-export) The symbol "Resolver" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 // src/utilities/graphql/storeUtils.ts:226:12 - (ae-forgotten-export) The symbol "storeKeyNameStringify" needs to be exported by the entry point index.d.ts
 // src/utilities/policies/pagination.ts:76:3 - (ae-forgotten-export) The symbol "TRelayEdge" needs to be exported by the entry point index.d.ts
 // src/utilities/policies/pagination.ts:77:3 - (ae-forgotten-export) The symbol "TRelayPageInfo" needs to be exported by the entry point index.d.ts
diff --git a/.api-reports/api-report.api.md b/.api-reports/api-report.api.md
index b8b6d18064..58d5f5cbdd 100644
--- a/.api-reports/api-report.api.md
+++ b/.api-reports/api-report.api.md
@@ -363,6 +363,7 @@ export interface BaseSubscriptionOptions<TData = any, TVariables extends Operati
     client?: ApolloClient<object>;
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     ignoreResults?: boolean;
     onComplete?: () => void;
@@ -2216,7 +2217,7 @@ class QueryManager<TStore> {
     // (undocumented)
     readonly ssrMode: boolean;
     // (undocumented)
-    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, }: SubscriptionOptions): Observable<FetchResult<T>>;
+    startGraphQLSubscription<T = any>({ query, fetchPolicy, errorPolicy, variables, context, extensions, }: SubscriptionOptions): Observable<FetchResult<T>>;
     stop(): void;
     // (undocumented)
     stopQuery(queryId: string): void;
@@ -2580,6 +2581,7 @@ export interface SubscriptionHookOptions<TData = any, TVariables extends Operati
 export interface SubscriptionOptions<TVariables = OperationVariables, TData = any> {
     context?: DefaultContext;
     errorPolicy?: ErrorPolicy;
+    extensions?: Record<string, any>;
     fetchPolicy?: FetchPolicy;
     query: DocumentNode | TypedDocumentNode<TData, TVariables>;
     variables?: TVariables;
@@ -3014,9 +3016,9 @@ interface WriteContext extends ReadMergeModifyContext {
 // src/core/ObservableQuery.ts:117:5 - (ae-forgotten-export) The symbol "QueryInfo" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:124:5 - (ae-forgotten-export) The symbol "MutationStoreValue" needs to be exported by the entry point index.d.ts
 // src/core/QueryManager.ts:158:5 - (ae-forgotten-export) The symbol "LocalState" needs to be exported by the entry point index.d.ts
-// src/core/QueryManager.ts:390:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
-// src/core/watchQueryOptions.ts:269:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
+// src/core/QueryManager.ts:391:7 - (ae-forgotten-export) The symbol "UpdateQueries" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "IgnoreModifier" needs to be exported by the entry point index.d.ts
+// src/core/watchQueryOptions.ts:272:2 - (ae-forgotten-export) The symbol "UpdateQueryFn" needs to be exported by the entry point index.d.ts
 // src/link/http/selectHttpOptionsAndBody.ts:128:32 - (ae-forgotten-export) The symbol "HttpQueryOptions" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:38:3 - (ae-forgotten-export) The symbol "SubscribeToMoreFunction" needs to be exported by the entry point index.d.ts
 // src/react/hooks/useBackgroundQuery.ts:54:3 - (ae-forgotten-export) The symbol "FetchMoreFunction" needs to be exported by the entry point index.d.ts
diff --git a/.changeset/angry-seals-jog.md b/.changeset/angry-seals-jog.md
new file mode 100644
index 0000000000..9ba52ae2f3
--- /dev/null
+++ b/.changeset/angry-seals-jog.md
@@ -0,0 +1,5 @@
+---
+"@apollo/client": minor
+---
+
+Support extensions in useSubscription
diff --git a/.size-limits.json b/.size-limits.json
index c81dd92070..3e400e4779 100644
--- a/.size-limits.json
+++ b/.size-limits.json
@@ -1,4 +1,4 @@
 {
-  "dist/apollo-client.min.cjs": 40110,
-  "import { ApolloClient, InMemoryCache, HttpLink } from \"dist/index.js\" (production)": 32941
+  "dist/apollo-client.min.cjs": 40179,
+  "import { ApolloClient, InMemoryCache, HttpLink } from \"dist/index.js\" (production)": 32973
 }
diff --git a/src/core/QueryManager.ts b/src/core/QueryManager.ts
index 92029d9a6f..9d230fcc3c 100644
--- a/src/core/QueryManager.ts
+++ b/src/core/QueryManager.ts
@@ -293,6 +293,7 @@ export class QueryManager<TStore> {
             optimisticResponse: isOptimistic ? optimisticResponse : void 0,
           },
           variables,
+          {},
           false
         ),
 
@@ -981,52 +982,55 @@ export class QueryManager<TStore> {
     errorPolicy = "none",
     variables,
     context = {},
+    extensions = {},
   }: SubscriptionOptions): Observable<FetchResult<T>> {
     query = this.transform(query);
     variables = this.getVariables(query, variables);
 
     const makeObservable = (variables: OperationVariables) =>
-      this.getObservableFromLink<T>(query, context, variables).map((result) => {
-        if (fetchPolicy !== "no-cache") {
-          // the subscription interface should handle not sending us results we no longer subscribe to.
-          // XXX I don't think we ever send in an object with errors, but we might in the future...
-          if (shouldWriteResult(result, errorPolicy)) {
-            this.cache.write({
-              query,
-              result: result.data,
-              dataId: "ROOT_SUBSCRIPTION",
-              variables: variables,
-            });
+      this.getObservableFromLink<T>(query, context, variables, extensions).map(
+        (result) => {
+          if (fetchPolicy !== "no-cache") {
+            // the subscription interface should handle not sending us results we no longer subscribe to.
+            // XXX I don't think we ever send in an object with errors, but we might in the future...
+            if (shouldWriteResult(result, errorPolicy)) {
+              this.cache.write({
+                query,
+                result: result.data,
+                dataId: "ROOT_SUBSCRIPTION",
+                variables: variables,
+              });
+            }
+
+            this.broadcastQueries();
           }
 
-          this.broadcastQueries();
-        }
+          const hasErrors = graphQLResultHasError(result);
+          const hasProtocolErrors = graphQLResultHasProtocolErrors(result);
+          if (hasErrors || hasProtocolErrors) {
+            const errors: ApolloErrorOptions = {};
+            if (hasErrors) {
+              errors.graphQLErrors = result.errors;
+            }
+            if (hasProtocolErrors) {
+              errors.protocolErrors = result.extensions[PROTOCOL_ERRORS_SYMBOL];
+            }
 
-        const hasErrors = graphQLResultHasError(result);
-        const hasProtocolErrors = graphQLResultHasProtocolErrors(result);
-        if (hasErrors || hasProtocolErrors) {
-          const errors: ApolloErrorOptions = {};
-          if (hasErrors) {
-            errors.graphQLErrors = result.errors;
-          }
-          if (hasProtocolErrors) {
-            errors.protocolErrors = result.extensions[PROTOCOL_ERRORS_SYMBOL];
+            // `errorPolicy` is a mechanism for handling GraphQL errors, according
+            // to our documentation, so we throw protocol errors regardless of the
+            // set error policy.
+            if (errorPolicy === "none" || hasProtocolErrors) {
+              throw new ApolloError(errors);
+            }
           }
 
-          // `errorPolicy` is a mechanism for handling GraphQL errors, according
-          // to our documentation, so we throw protocol errors regardless of the
-          // set error policy.
-          if (errorPolicy === "none" || hasProtocolErrors) {
-            throw new ApolloError(errors);
+          if (errorPolicy === "ignore") {
+            delete result.errors;
           }
-        }
 
-        if (errorPolicy === "ignore") {
-          delete result.errors;
+          return result;
         }
-
-        return result;
-      });
+      );
 
     if (this.getDocumentInfo(query).hasClientExports) {
       const observablePromise = this.localState
@@ -1088,6 +1092,7 @@ export class QueryManager<TStore> {
     query: DocumentNode,
     context: any,
     variables?: OperationVariables,
+    extensions?: Record<string, any>,
     // Prefer context.queryDeduplication if specified.
     deduplication: boolean = context?.queryDeduplication ??
       this.queryDeduplication
@@ -1106,6 +1111,7 @@ export class QueryManager<TStore> {
           ...context,
           forceFetch: !deduplication,
         }),
+        extensions,
       };
 
       context = operation.context;
diff --git a/src/core/watchQueryOptions.ts b/src/core/watchQueryOptions.ts
index 5810c6464c..b05cdb13c3 100644
--- a/src/core/watchQueryOptions.ts
+++ b/src/core/watchQueryOptions.ts
@@ -206,6 +206,9 @@ export interface SubscriptionOptions<
 
   /** {@inheritDoc @apollo/client!SubscriptionOptionsDocumentation#context:member} */
   context?: DefaultContext;
+
+  /** {@inheritDoc @apollo/client!SubscriptionOptionsDocumentation#extensions:member} */
+  extensions?: Record<string, any>;
 }
 
 export interface MutationBaseOptions<
diff --git a/src/react/hooks/__tests__/useSubscription.test.tsx b/src/react/hooks/__tests__/useSubscription.test.tsx
index c003585f30..0c9002638d 100644
--- a/src/react/hooks/__tests__/useSubscription.test.tsx
+++ b/src/react/hooks/__tests__/useSubscription.test.tsx
@@ -459,6 +459,74 @@ describe("useSubscription Hook", () => {
     expect(context!).toBe("Audi");
   });
 
+  it("should share extensions set in options", async () => {
+    const subscription = gql`
+      subscription {
+        car {
+          make
+        }
+      }
+    `;
+
+    const results = ["Audi", "BMW"].map((make) => ({
+      result: { data: { car: { make } } },
+    }));
+
+    let extensions: string;
+    const link = new MockSubscriptionLink();
+    const extensionsLink = new ApolloLink((operation, forward) => {
+      extensions = operation.extensions.make;
+      return forward(operation);
+    });
+    const client = new ApolloClient({
+      link: concat(extensionsLink, link),
+      cache: new Cache({ addTypename: false }),
+    });
+
+    const { result } = renderHook(
+      () =>
+        useSubscription(subscription, {
+          extensions: { make: "Audi" },
+        }),
+      {
+        wrapper: ({ children }) => (
+          <ApolloProvider client={client}>{children}</ApolloProvider>
+        ),
+      }
+    );
+
+    expect(result.current.loading).toBe(true);
+    expect(result.current.error).toBe(undefined);
+    expect(result.current.data).toBe(undefined);
+    setTimeout(() => {
+      link.simulateResult(results[0]);
+    }, 100);
+
+    await waitFor(
+      () => {
+        expect(result.current.data).toEqual(results[0].result.data);
+      },
+      { interval: 1 }
+    );
+    expect(result.current.loading).toBe(false);
+    expect(result.current.error).toBe(undefined);
+
+    setTimeout(() => {
+      link.simulateResult(results[1]);
+    });
+
+    await waitFor(
+      () => {
+        expect(result.current.data).toEqual(results[1].result.data);
+      },
+      { interval: 1 }
+    );
+    expect(result.current.loading).toBe(false);
+    expect(result.current.error).toBe(undefined);
+
+    expect(extensions!).toBe("Audi");
+  });
+
   it("should handle multiple subscriptions properly", async () => {
     const subscription = gql`
       subscription {
diff --git a/src/react/hooks/useSubscription.ts b/src/react/hooks/useSubscription.ts
index 0bbcb9cf17..fc2280c7bf 100644
--- a/src/react/hooks/useSubscription.ts
+++ b/src/react/hooks/useSubscription.ts
@@ -146,23 +146,11 @@ export function useSubscription<
     errorPolicy,
     shouldResubscribe,
     context,
+    extensions,
     ignoreResults,
   } = options;
   const variables = useDeepMemo(() => options.variables, [options.variables]);
 
-  let [observable, setObservable] = React.useState(() =>
-    options.skip ? null : (
-      createSubscription(
-        client,
-        subscription,
-        variables,
-        fetchPolicy,
-        errorPolicy,
-        context
-      )
-    )
-  );
-
   const recreate = () =>
     createSubscription(
       client,
@@ -170,9 +158,14 @@ export function useSubscription<
       variables,
       fetchPolicy,
       errorPolicy,
-      context
+      context,
+      extensions
     );
 
+  let [observable, setObservable] = React.useState(
+    options.skip ? null : recreate
+  );
+
   const recreateRef = React.useRef(recreate);
   useIsomorphicLayoutEffect(() => {
     recreateRef.current = recreate;
@@ -331,17 +324,23 @@ function createSubscription<
 >(
   client: ApolloClient<any>,
   query: TypedDocumentNode<TData, TVariables>,
-  variables?: TVariables,
-  fetchPolicy?: FetchPolicy,
-  errorPolicy?: ErrorPolicy,
-  context?: DefaultContext
+  variables: TVariables | undefined,
+  fetchPolicy: FetchPolicy | undefined,
+  errorPolicy: ErrorPolicy | undefined,
+  context: DefaultContext | undefined,
+  extensions: Record<string, any> | undefined
 ) {
-  const __ = {
-    variables,
-    client,
+  const options = {
     query,
+    variables,
     fetchPolicy,
     errorPolicy,
+    context,
+    extensions,
+  };
+  const __ = {
+    ...options,
+    client,
     result: {
       loading: true,
       data: void 0,
@@ -359,13 +358,7 @@ function createSubscription<
       // lazily start the subscription when the first observer subscribes
       // to get around strict mode
       if (!observable) {
-        observable = client.subscribe({
-          query,
-          variables,
-          fetchPolicy,
-          errorPolicy,
-          context,
-        });
+        observable = client.subscribe(options);
       }
       const sub = observable.subscribe(observer);
       return () => sub.unsubscribe();
diff --git a/src/react/types/types.documentation.ts b/src/react/types/types.documentation.ts
index c5f232c1b1..515834e7cb 100644
--- a/src/react/types/types.documentation.ts
+++ b/src/react/types/types.documentation.ts
@@ -552,6 +552,11 @@ export interface SubscriptionOptionsDocumentation {
    */
   context: unknown;
 
+  /**
+   * Shared context between your component and your network interface (Apollo Link).
+   */
+  extensions: unknown;
+
   /**
    * Allows the registration of a callback function that will be triggered each time the `useSubscription` Hook / `Subscription` component completes the subscription.
    *
diff --git a/src/react/types/types.ts b/src/react/types/types.ts
index ee44164073..cd2e6df1cc 100644
--- a/src/react/types/types.ts
+++ b/src/react/types/types.ts
@@ -449,6 +449,8 @@ export interface BaseSubscriptionOptions<
   skip?: boolean;
   /** {@inheritDoc @apollo/client!SubscriptionOptionsDocumentation#context:member} */
   context?: DefaultContext;
+  /** {@inheritDoc @apollo/client!SubscriptionOptionsDocumentation#extensions:member} */
+  extensions?: Record<string, any>;
   /** {@inheritDoc @apollo/client!SubscriptionOptionsDocumentation#onComplete:member} */
   onComplete?: () => void;
   /** {@inheritDoc @apollo/client!SubscriptionOptionsDocumentation#onData:member} */