diff --git a/extension/src/background.ts b/extension/src/background.ts
index d604dbb..f9b2a1d 100644
--- a/extension/src/background.ts
+++ b/extension/src/background.ts
@@ -600,6 +600,12 @@ async function handleCommand(msg: ExtensionCommandMessage): Promise<any> {
 
   const debuggee = targetTabId ? { tabId: targetTabId } : undefined
 
+  // TODO disable network things?
+  // if (msg.params.method === 'Network.enable' && msg.params.source !== 'playwriter') {
+  //   logger.debug('Skipping Network.enable from non-playwriter CDP client:', msg.params.sessionId)
+  //   return {}
+  // }
+
   switch (msg.params.method) {
     case 'Runtime.enable': {
       if (!debuggee) {
diff --git a/playwriter/src/cdp-relay.ts b/playwriter/src/cdp-relay.ts
index b9fd938..f78aefa 100644
--- a/playwriter/src/cdp-relay.ts
+++ b/playwriter/src/cdp-relay.ts
@@ -267,7 +267,7 @@ export async function startPlayWriterCDPRelayServer({ port = 19988, host = '127.
     }
   }
 
-  async function routeCdpCommand({ method, params, sessionId }: { method: string; params: any; sessionId?: string }) {
+  async function routeCdpCommand({ method, params, sessionId, source }: { method: string; params: any; sessionId?: string; source?: 'playwriter' }) {
     switch (method) {
       case 'Browser.getVersion': {
         return {
@@ -349,14 +349,14 @@ export async function startPlayWriterCDPRelayServer({ port = 19988, host = '127.
       case 'Target.createTarget': {
         return await sendToExtension({
           method: 'forwardCDPCommand',
-          params: { method, params }
+          params: { method, params, source }
         })
       }
 
       case 'Target.closeTarget': {
         return await sendToExtension({
           method: 'forwardCDPCommand',
-          params: { method, params }
+          params: { method, params, source }
         })
       }
 
@@ -386,7 +386,7 @@ export async function startPlayWriterCDPRelayServer({ port = 19988, host = '127.
 
         const result = await sendToExtension({
           method: 'forwardCDPCommand',
-          params: { sessionId, method, params }
+          params: { sessionId, method, params, source }
         })
 
         await contextCreatedPromise
@@ -397,7 +397,7 @@ export async function startPlayWriterCDPRelayServer({ port = 19988, host = '127.
 
     return await sendToExtension({
       method: 'forwardCDPCommand',
-      params: { sessionId, method, params }
+      params: { sessionId, method, params, source }
     })
   }
 
@@ -582,7 +582,7 @@ export async function startPlayWriterCDPRelayServer({ port = 19988, host = '127.
           return
         }
 
-        const { id, sessionId, method, params } = message
+        const { id, sessionId, method, params, source } = message
 
         logCdpMessage({
           direction: 'from-playwright',
@@ -607,7 +607,7 @@ export async function startPlayWriterCDPRelayServer({ port = 19988, host = '127.
         }
 
         try {
-          const result: any = await routeCdpCommand({ method, params, sessionId })
+          const result: any = await routeCdpCommand({ method, params, sessionId, source })
 
           if (method === 'Target.setAutoAttach' && !sessionId) {
             for (const target of connectedTargets.values()) {
diff --git a/playwriter/src/cdp-session.ts b/playwriter/src/cdp-session.ts
index 4edda2e..a171221 100644
--- a/playwriter/src/cdp-session.ts
+++ b/playwriter/src/cdp-session.ts
@@ -73,7 +73,13 @@ export class CDPSession implements ICDPSession {
     params?: ProtocolMapping.Commands[K]['paramsType'][0],
   ): Promise<ProtocolMapping.Commands[K]['returnType']> {
     const id = ++this.messageId
-    const message: Record<string, unknown> = { id, method, params }
+    const message: {
+      id: number
+      method: K
+      params?: ProtocolMapping.Commands[K]['paramsType'][0]
+      sessionId?: string
+      source?: 'playwriter'
+    } = { id, method, params, source: 'playwriter' }
     if (this.sessionId) {
       message.sessionId = this.sessionId
     }
diff --git a/playwriter/src/cdp-types.ts b/playwriter/src/cdp-types.ts
index 6b8e477..3b5b2a8 100644
--- a/playwriter/src/cdp-types.ts
+++ b/playwriter/src/cdp-types.ts
@@ -1,11 +1,14 @@
 import type { Protocol } from 'devtools-protocol';
 import type { ProtocolMapping } from 'devtools-protocol/types/protocol-mapping.js';
 
+export type CDPCommandSource = 'playwriter';
+
 export type CDPCommandFor<T extends keyof ProtocolMapping.Commands> = {
   id: number;
   sessionId?: string;
   method: T;
   params?: ProtocolMapping.Commands[T]['paramsType'][0];
+  source?: CDPCommandSource;
 };
 
 export type CDPCommand = {
diff --git a/playwriter/src/protocol.ts b/playwriter/src/protocol.ts
index f86330a..376f203 100644
--- a/playwriter/src/protocol.ts
+++ b/playwriter/src/protocol.ts
@@ -11,6 +11,7 @@ type ForwardCDPCommand =
         method: K
         sessionId?: string
         params?: ProtocolMapping.Commands[K]['paramsType'][0]
+        source?: 'playwriter'
       }
     }
   }[keyof ProtocolMapping.Commands]