diff --git a/packages/playwright-core/src/server/firefox/ffPage.ts b/packages/playwright-core/src/server/firefox/ffPage.ts
index 2576884ef6..b3d67e2bcc 100644
--- a/packages/playwright-core/src/server/firefox/ffPage.ts
+++ b/packages/playwright-core/src/server/firefox/ffPage.ts
@@ -79,6 +79,7 @@ export class FFPage implements PageDelegate {
       eventsHelper.addEventListener(this._session, 'Page.sameDocumentNavigation', this._onSameDocumentNavigation.bind(this)),
       eventsHelper.addEventListener(this._session, 'Runtime.executionContextCreated', this._onExecutionContextCreated.bind(this)),
       eventsHelper.addEventListener(this._session, 'Runtime.executionContextDestroyed', this._onExecutionContextDestroyed.bind(this)),
+      eventsHelper.addEventListener(this._session, 'Runtime.executionContextsCleared', this._onExecutionContextsCleared.bind(this)),
       eventsHelper.addEventListener(this._session, 'Page.linkClicked', event => this._onLinkClicked(event.phase)),
       eventsHelper.addEventListener(this._session, 'Page.uncaughtError', this._onUncaughtError.bind(this)),
       eventsHelper.addEventListener(this._session, 'Runtime.console', this._onConsole.bind(this)),
@@ -184,6 +185,11 @@ export class FFPage implements PageDelegate {
     context.frame._contextDestroyed(context);
   }
 
+  _onExecutionContextsCleared() {
+    for (const executionContextId of Array.from(this._contextIdToContext.keys()))
+      this._onExecutionContextDestroyed({ executionContextId });
+  }
+
   private _removeContextsForFrame(frame: frames.Frame) {
     for (const [contextId, context] of this._contextIdToContext) {
       if (context.frame === frame)
diff --git a/tests/page/page-autowaiting-basic.spec.ts b/tests/page/page-autowaiting-basic.spec.ts
index 5de8f17685..5d3e9812be 100644
--- a/tests/page/page-autowaiting-basic.spec.ts
+++ b/tests/page/page-autowaiting-basic.spec.ts
@@ -164,7 +164,9 @@ it('should await navigation when assigning location twice', async ({ page, serve
   expect(messages.join('|')).toBe('routeoverride|evaluate');
 });
 
-it('should await navigation when evaluating reload', async ({ page, server }) => {
+it('should await navigation when evaluating reload', async ({ page, server, browserName }) => {
+  it.fixme(browserName === 'firefox', 'With fission enabled, navigations in Firefox start asynchronously');
+
   await page.goto(server.EMPTY_PAGE);
   const messages = initServer(server);
   await Promise.all([