diff --git a/packages/playwright-core/browsers.json b/packages/playwright-core/browsers.json
index affe4a99ef..f13c77b27e 100644
--- a/packages/playwright-core/browsers.json
+++ b/packages/playwright-core/browsers.json
@@ -21,13 +21,13 @@
     },
     {
       "name": "firefox",
-      "revision": "1406",
+      "revision": "1408",
       "installByDefault": true,
       "browserVersion": "113.0"
     },
     {
       "name": "firefox-beta",
-      "revision": "1408",
+      "revision": "1410",
       "installByDefault": false,
       "browserVersion": "114.0b3"
     },
diff --git a/packages/playwright-core/src/server/firefox/ffBrowser.ts b/packages/playwright-core/src/server/firefox/ffBrowser.ts
index 7cd57188ef..f805318c4f 100644
--- a/packages/playwright-core/src/server/firefox/ffBrowser.ts
+++ b/packages/playwright-core/src/server/firefox/ffBrowser.ts
@@ -16,7 +16,7 @@
  */
 
 import { kBrowserClosedError } from '../../common/errors';
-import { assert } from '../../utils';
+import { assert, getAsBooleanFromENV } from '../../utils';
 import type { BrowserOptions } from '../browser';
 import { Browser } from '../browser';
 import { assertBrowserContextIsNotOwned, BrowserContext, verifyGeolocation } from '../browserContext';
@@ -41,8 +41,14 @@ export class FFBrowser extends Browser {
     const browser = new FFBrowser(connection, options);
     if ((options as any).__testHookOnConnectToBrowser)
       await (options as any).__testHookOnConnectToBrowser();
+    let firefoxUserPrefs = options.persistent ? {} : options.originalLaunchOptions.firefoxUserPrefs ?? {};
+    if (Object.keys(kBandaidFirefoxUserPrefs).length)
+      firefoxUserPrefs = { ...kBandaidFirefoxUserPrefs, ...firefoxUserPrefs };
     const promises: Promise<any>[] = [
-      connection.send('Browser.enable', { attachToDefaultContext: !!options.persistent }),
+      connection.send('Browser.enable', {
+        attachToDefaultContext: !!options.persistent,
+        userPrefs: Object.entries(firefoxUserPrefs).map(([name, value]) => ({ name, value })),
+      }),
       browser._initVersion(),
     ];
     if (options.persistent) {
@@ -408,3 +414,8 @@ function toJugglerProxyOptions(proxy: types.ProxySettings) {
     password: proxy.password
   };
 }
+
+// Prefs for quick fixes that didn't make it to the build.
+// Should all be moved to `playwright.cfg`.
+const kBandaidFirefoxUserPrefs = {};
+
diff --git a/packages/playwright-core/src/server/firefox/firefox.ts b/packages/playwright-core/src/server/firefox/firefox.ts
index 38c6db85d3..7ffbaebbf3 100644
--- a/packages/playwright-core/src/server/firefox/firefox.ts
+++ b/packages/playwright-core/src/server/firefox/firefox.ts
@@ -16,7 +16,6 @@
  */
 
 import * as os from 'os';
-import fs from 'fs';
 import path from 'path';
 import { FFBrowser } from './ffBrowser';
 import { kBrowserCloseMessageId } from './ffConnection';
@@ -26,7 +25,7 @@ import type { ConnectionTransport } from '../transport';
 import type { BrowserOptions, PlaywrightOptions } from '../browser';
 import type * as types from '../types';
 import { rewriteErrorMessage } from '../../utils/stackTrace';
-import { getAsBooleanFromENV, wrapInASCIIBox } from '../../utils';
+import { wrapInASCIIBox } from '../../utils';
 
 export class Firefox extends BrowserType {
   constructor(playwrightOptions: PlaywrightOptions) {
@@ -67,17 +66,6 @@ export class Firefox extends BrowserType {
       throw new Error('Pass userDataDir parameter to `browserType.launchPersistentContext(userDataDir, ...)` instead of specifying --profile argument');
     if (args.find(arg => arg.startsWith('-juggler')))
       throw new Error('Use the port parameter instead of -juggler argument');
-    let firefoxUserPrefs = isPersistent ? undefined : options.firefoxUserPrefs;
-    if (getAsBooleanFromENV('PLAYWRIGHT_DISABLE_FIREFOX_CROSS_PROCESS'))
-      firefoxUserPrefs = { ...kDisableFissionFirefoxUserPrefs, ...firefoxUserPrefs };
-    if (Object.keys(kBandaidFirefoxUserPrefs).length)
-      firefoxUserPrefs = { ...kBandaidFirefoxUserPrefs, ...firefoxUserPrefs };
-    if (firefoxUserPrefs) {
-      const lines: string[] = [];
-      for (const [name, value] of Object.entries(firefoxUserPrefs))
-        lines.push(`user_pref(${JSON.stringify(name)}, ${JSON.stringify(value)});`);
-      fs.writeFileSync(path.join(userDataDir, 'user.js'), lines.join('\n'));
-    }
     const firefoxArguments = ['-no-remote'];
     if (headless) {
       firefoxArguments.push('-headless');
@@ -96,14 +84,3 @@ export class Firefox extends BrowserType {
   }
 }
 
-// Prefs for quick fixes that didn't make it to the build.
-// Should all be moved to `playwright.cfg`.
-const kBandaidFirefoxUserPrefs = {};
-
-const kDisableFissionFirefoxUserPrefs = {
-  'browser.tabs.remote.useCrossOriginEmbedderPolicy': false,
-  'browser.tabs.remote.useCrossOriginOpenerPolicy': false,
-  'browser.tabs.remote.separatePrivilegedMozillaWebContentProcess': false,
-  'fission.autostart': false,
-  'browser.tabs.remote.systemTriggeredAboutBlankAnywhere': true,
-};
diff --git a/packages/playwright-core/src/server/firefox/protocol.d.ts b/packages/playwright-core/src/server/firefox/protocol.d.ts
index a84c71896c..417cc489a2 100644
--- a/packages/playwright-core/src/server/firefox/protocol.d.ts
+++ b/packages/playwright-core/src/server/firefox/protocol.d.ts
@@ -8,6 +8,10 @@ export module Protocol {
       browserContextId?: string;
       openerId?: string;
     };
+    export type UserPreference = {
+      name: string;
+      value: any;
+    };
     export type CookieOptions = {
       name: string;
       value: string;
@@ -71,6 +75,10 @@ export module Protocol {
     }
     export type enableParameters = {
       attachToDefaultContext: boolean;
+      userPrefs?: {
+        name: string;
+        value: any;
+      }[];
     };
     export type enableReturnValue = void;
     export type createBrowserContextParameters = {
diff --git a/tests/library/video.spec.ts b/tests/library/video.spec.ts
index 0bf9eda45d..03b39b8e84 100644
--- a/tests/library/video.spec.ts
+++ b/tests/library/video.spec.ts
@@ -163,7 +163,6 @@ it.describe('screencast', () => {
   });
 
   it('should work with old options', async ({ browser, browserName, trace, headless, isWindows }, testInfo) => {
-    it.fixme(browserName === 'firefox' && !headless && isWindows, 'https://github.com/microsoft/playwright/issues/22618');
     const videosPath = testInfo.outputPath('');
     // Firefox does not have a mobile variant and has a large minimum size (500 on windows and 450 elsewhere).
     const size = browserName === 'firefox' ? { width: 500, height: 400 } : { width: 320, height: 240 };
@@ -188,7 +187,6 @@ it.describe('screencast', () => {
   });
 
   it('should capture static page', async ({ browser, browserName, trace, headless, isWindows }, testInfo) => {
-    it.fixme(browserName === 'firefox' && !headless && isWindows, 'https://github.com/microsoft/playwright/issues/22618');
     // Firefox does not have a mobile variant and has a large minimum size (500 on windows and 450 elsewhere).
     const size = browserName === 'firefox' ? { width: 500, height: 400 } : { width: 320, height: 240 };
     const context = await browser.newContext({