diff --git a/docs/api/puppeteer.httprequest.initiator.md b/docs/api/puppeteer.httprequest.initiator.md
index f66f174a53143..cd98a3fa67adc 100644
--- a/docs/api/puppeteer.httprequest.initiator.md
+++ b/docs/api/puppeteer.httprequest.initiator.md
@@ -10,10 +10,10 @@ The initiator of the request.
 
 ```typescript
 class HTTPRequest {
-  initiator(): Protocol.Network.Initiator;
+  initiator(): Protocol.Network.Initiator | undefined;
 }
 ```
 
 **Returns:**
 
-Protocol.Network.Initiator
+Protocol.Network.Initiator \| undefined
diff --git a/docs/index.md b/docs/index.md
index ecd7eab401b12..e55470ad84a7a 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -197,8 +197,8 @@ version of Chrome or Chromium, pass in the executable's path when creating a
 const browser = await puppeteer.launch({executablePath: '/path/to/Chrome'});
 ```
 
-You can also use Puppeteer with Firefox Nightly (experimental support). See
-[`Puppeteer.launch`](https://pptr.dev/api/puppeteer.puppeteernode.launch) for
+You can also use Puppeteer with Firefox. See
+[status of cross-browser support](https://pptr.dev/faq/#q-what-is-the-status-of-cross-browser-support) for
 more information.
 
 See
diff --git a/packages/puppeteer-core/src/api/HTTPRequest.ts b/packages/puppeteer-core/src/api/HTTPRequest.ts
index fb16cc7b005b6..460077568e7c8 100644
--- a/packages/puppeteer-core/src/api/HTTPRequest.ts
+++ b/packages/puppeteer-core/src/api/HTTPRequest.ts
@@ -272,7 +272,7 @@ export class HTTPRequest {
   /**
    * The initiator of the request.
    */
-  initiator(): Protocol.Network.Initiator {
+  initiator(): Protocol.Network.Initiator | undefined {
     throw new Error('Not implemented');
   }
 
diff --git a/packages/puppeteer-core/src/common/HTTPRequest.ts b/packages/puppeteer-core/src/common/HTTPRequest.ts
index 7eeee5ee2391a..3016df70540fa 100644
--- a/packages/puppeteer-core/src/common/HTTPRequest.ts
+++ b/packages/puppeteer-core/src/common/HTTPRequest.ts
@@ -63,7 +63,7 @@ export class HTTPRequest extends BaseHTTPRequest {
     action: InterceptResolutionAction.None,
   };
   #interceptHandlers: Array<() => void | PromiseLike<any>>;
-  #initiator: Protocol.Network.Initiator;
+  #initiator?: Protocol.Network.Initiator;
 
   override get client(): CDPSession {
     return this.#client;
@@ -74,27 +74,52 @@ export class HTTPRequest extends BaseHTTPRequest {
     frame: Frame | null,
     interceptionId: string | undefined,
     allowInterception: boolean,
-    event: Protocol.Network.RequestWillBeSentEvent,
+    data: {
+      /**
+       * Request identifier.
+       */
+      requestId: Protocol.Network.RequestId;
+      /**
+       * Loader identifier. Empty string if the request is fetched from worker.
+       */
+      loaderId?: Protocol.Network.LoaderId;
+      /**
+       * URL of the document this request is loaded for.
+       */
+      documentURL?: string;
+      /**
+       * Request data.
+       */
+      request: Protocol.Network.Request;
+      /**
+       * Request initiator.
+       */
+      initiator?: Protocol.Network.Initiator;
+      /**
+       * Type of this resource.
+       */
+      type?: Protocol.Network.ResourceType;
+    },
     redirectChain: HTTPRequest[]
   ) {
     super();
     this.#client = client;
-    this._requestId = event.requestId;
+    this._requestId = data.requestId;
     this.#isNavigationRequest =
-      event.requestId === event.loaderId && event.type === 'Document';
+      data.requestId === data.loaderId && data.type === 'Document';
     this._interceptionId = interceptionId;
     this.#allowInterception = allowInterception;
-    this.#url = event.request.url;
-    this.#resourceType = (event.type || 'other').toLowerCase() as ResourceType;
-    this.#method = event.request.method;
-    this.#postData = event.request.postData;
+    this.#url = data.request.url;
+    this.#resourceType = (data.type || 'other').toLowerCase() as ResourceType;
+    this.#method = data.request.method;
+    this.#postData = data.request.postData;
     this.#frame = frame;
     this._redirectChain = redirectChain;
     this.#continueRequestOverrides = {};
     this.#interceptHandlers = [];
-    this.#initiator = event.initiator;
+    this.#initiator = data.initiator;
 
-    for (const [key, value] of Object.entries(event.request.headers)) {
+    for (const [key, value] of Object.entries(data.request.headers)) {
       this.#headers[key.toLowerCase()] = value;
     }
   }
@@ -184,7 +209,7 @@ export class HTTPRequest extends BaseHTTPRequest {
     return this.#isNavigationRequest;
   }
 
-  override initiator(): Protocol.Network.Initiator {
+  override initiator(): Protocol.Network.Initiator | undefined {
     return this.#initiator;
   }
 
diff --git a/packages/puppeteer-core/src/common/NetworkManager.ts b/packages/puppeteer-core/src/common/NetworkManager.ts
index 4d05f4ed91df4..6ef7d2244d31a 100644
--- a/packages/puppeteer-core/src/common/NetworkManager.ts
+++ b/packages/puppeteer-core/src/common/NetworkManager.ts
@@ -336,6 +336,7 @@ export class NetworkManager extends EventEmitter {
     const {networkId: networkRequestId, requestId: fetchRequestId} = event;
 
     if (!networkRequestId) {
+      this.#onRequestWithoutNetworkInstrumentation(event);
       return;
     }
 
@@ -374,6 +375,27 @@ export class NetworkManager extends EventEmitter {
     };
   }
 
+  #onRequestWithoutNetworkInstrumentation(
+    event: Protocol.Fetch.RequestPausedEvent
+  ): void {
+    // If an event has no networkId it should not have any network events. We
+    // still want to dispatch it for the interception by the user.
+    const frame = event.frameId
+      ? this.#frameManager.frame(event.frameId)
+      : null;
+
+    const request = new HTTPRequest(
+      this.#client,
+      frame,
+      event.requestId,
+      this.#userRequestInterceptionEnabled,
+      event,
+      []
+    );
+    this.emit(NetworkManagerEmittedEvents.Request, request);
+    request.finalizeInterceptions();
+  }
+
   #onRequest(
     event: Protocol.Network.RequestWillBeSentEvent,
     fetchRequestId?: FetchRequestId
diff --git a/test/src/requestinterception.spec.ts b/test/src/requestinterception.spec.ts
index 0a0dbf709b29c..2c55fe67c4703 100644
--- a/test/src/requestinterception.spec.ts
+++ b/test/src/requestinterception.spec.ts
@@ -127,6 +127,22 @@ describe('request interception', function () {
       expect(requests[1]!.url()).toContain('/one-style.css');
       expect(requests[1]!.headers()['referer']).toContain('/one-style.html');
     });
+    it('should work with requests without networkId', async () => {
+      const {page, server} = getTestState();
+      await page.goto(server.EMPTY_PAGE);
+      await page.setRequestInterception(true);
+
+      const cdp = await page.target().createCDPSession();
+      await cdp.send('DOM.enable');
+      const urls: string[] = [];
+      page.on('request', request => {
+        urls.push(request.url());
+        return request.continue();
+      });
+      // This causes network requests without networkId.
+      await cdp.send('CSS.enable');
+      expect(urls).toStrictEqual([server.EMPTY_PAGE]);
+    });
     it('should properly return navigation response when URL has cookies', async () => {
       const {page, server} = getTestState();