diff --git a/package.json b/package.json
index 90a1910015b64..51832b220d002 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "main": "index.js",
   "playwright": {
     "chromium_revision": "754895",
-    "firefox_revision": "1067",
+    "firefox_revision": "1069",
     "webkit_revision": "1185"
   },
   "scripts": {
diff --git a/src/firefox/ffBrowser.ts b/src/firefox/ffBrowser.ts
index c065bdd03a197..17847207e789d 100644
--- a/src/firefox/ffBrowser.ts
+++ b/src/firefox/ffBrowser.ts
@@ -96,6 +96,7 @@ export class FFBrowser extends EventEmitter implements Browser {
       javaScriptDisabled: options.javaScriptEnabled === false ? true : undefined,
       viewport,
       locale: options.locale,
+      timezoneId: options.timezoneId,
       removeOnDetach: true
     });
     const context = new FFBrowserContext(this, browserContextId, options);
@@ -197,6 +198,10 @@ export class FFBrowserContext extends BrowserContextBase {
     assertBrowserContextIsNotOwned(this);
     const { targetId } = await this._browser._connection.send('Browser.newPage', {
       browserContextId: this._browserContextId || undefined
+    }).catch(e =>  {
+      if (e.message.includes('Failed to override timezone'))
+        throw new Error(`Invalid timezone ID: ${this._options.timezoneId}`);
+      throw e;
     });
     const ffPage = this._browser._ffPages.get(targetId)!;
     const pageOrError = await ffPage.pageOrError();
diff --git a/test/emulation.spec.js b/test/emulation.spec.js
index 23b8b1325acc6..8aa3e746cb30e 100644
--- a/test/emulation.spec.js
+++ b/test/emulation.spec.js
@@ -255,7 +255,7 @@ module.exports.describe = function({testRunner, expect, playwright, headless, FF
     });
   });
 
-  describe.fail(FFOX)('BrowserContext({timezoneId})', function() {
+  describe('BrowserContext({timezoneId})', function() {
     it('should work', async ({ browser }) => {
       const func = () => new Date(1479579154987).toString();
       {
@@ -342,7 +342,7 @@ module.exports.describe = function({testRunner, expect, playwright, headless, FF
         await context.close();
       }
     });
-    it.fail(FFOX)('should format date', async({browser, server}) => {
+    it('should format date', async({browser, server}) => {
       {
         const context = await browser.newContext({ locale: 'en-US', timezoneId: 'America/Los_Angeles' });
         const page = await context.newPage();