diff --git a/README.md b/README.md
index 2fc5f8f3f2..2a3d135282 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # 🎭 Playwright
 
-[![npm version](https://img.shields.io/npm/v/playwright.svg?style=flat)](https://www.npmjs.com/package/playwright) [![Join Slack](https://img.shields.io/badge/join-slack-infomational)](https://aka.ms/playwright-slack) <!-- GEN:chromium-version-badge -->[![Chromium version](https://img.shields.io/badge/chromium-92.0.4513.0-blue.svg?logo=google-chrome)](https://www.chromium.org/Home)<!-- GEN:stop --> <!-- GEN:firefox-version-badge -->[![Firefox version](https://img.shields.io/badge/firefox-89.0b9-blue.svg?logo=mozilla-firefox)](https://www.mozilla.org/en-US/firefox/new/)<!-- GEN:stop --> <!-- GEN:webkit-version-badge -->[![WebKit version](https://img.shields.io/badge/webkit-14.2-blue.svg?logo=safari)](https://webkit.org/)<!-- GEN:stop -->
+[![npm version](https://img.shields.io/npm/v/playwright.svg?style=flat)](https://www.npmjs.com/package/playwright) [![Join Slack](https://img.shields.io/badge/join-slack-infomational)](https://aka.ms/playwright-slack) <!-- GEN:chromium-version-badge -->[![Chromium version](https://img.shields.io/badge/chromium-92.0.4513.0-blue.svg?logo=google-chrome)](https://www.chromium.org/Home)<!-- GEN:stop --> <!-- GEN:firefox-version-badge -->[![Firefox version](https://img.shields.io/badge/firefox-89.0b15-blue.svg?logo=mozilla-firefox)](https://www.mozilla.org/en-US/firefox/new/)<!-- GEN:stop --> <!-- GEN:webkit-version-badge -->[![WebKit version](https://img.shields.io/badge/webkit-14.2-blue.svg?logo=safari)](https://webkit.org/)<!-- GEN:stop -->
 
 ## [Documentation](https://playwright.dev) | [API reference](https://playwright.dev/docs/api/class-playwright/)
 
@@ -10,7 +10,7 @@ Playwright is a Node.js library to automate [Chromium](https://www.chromium.org/
 |   :---   | :---: | :---: | :---:   |
 | Chromium <!-- GEN:chromium-version -->92.0.4513.0<!-- GEN:stop --> | :white_check_mark: | :white_check_mark: | :white_check_mark: |
 | WebKit <!-- GEN:webkit-version -->14.2<!-- GEN:stop --> | :white_check_mark: | :white_check_mark: | :white_check_mark: |
-| Firefox <!-- GEN:firefox-version -->89.0b9<!-- GEN:stop --> | :white_check_mark: | :white_check_mark: | :white_check_mark: |
+| Firefox <!-- GEN:firefox-version -->89.0b15<!-- GEN:stop --> | :white_check_mark: | :white_check_mark: | :white_check_mark: |
 
 Headless execution is supported for all the browsers on all platforms. Check out [system requirements](https://playwright.dev/docs/intro/#system-requirements) for details.
 
diff --git a/browsers.json b/browsers.json
index 69a0d1a603..8de417ba40 100644
--- a/browsers.json
+++ b/browsers.json
@@ -8,12 +8,12 @@
     },
     {
       "name": "firefox",
-      "revision": "1266",
+      "revision": "1268",
       "installByDefault": true
     },
     {
       "name": "firefox-stable",
-      "revision": "1256",
+      "revision": "1257",
       "installByDefault": false
     },
     {
diff --git a/tests/page/page-evaluate.spec.ts b/tests/page/page-evaluate.spec.ts
index 842621c8e8..cd73ce0587 100644
--- a/tests/page/page-evaluate.spec.ts
+++ b/tests/page/page-evaluate.spec.ts
@@ -551,7 +551,6 @@ it('should not use toJSON when evaluating', async ({ page }) => {
 });
 
 it('should not use Array.prototype.toJSON when evaluating', async ({ page, browserName }) => {
-  it.fixme(browserName === 'firefox', 'https://github.com/microsoft/playwright/issues/6750');
   const result = await page.evaluate(() => {
     (Array.prototype as any).toJSON = () => 'busted';
     return [1, 2, 3];