diff --git a/browsers.json b/browsers.json
index 05e314c3e5597..ded1c1245c48a 100644
--- a/browsers.json
+++ b/browsers.json
@@ -8,12 +8,12 @@
     },
     {
       "name": "firefox",
-      "revision": "1167",
+      "revision": "1169",
       "download": true
     },
     {
       "name": "webkit",
-      "revision": "1334",
+      "revision": "1337",
       "download": true
     }
   ]
diff --git a/src/server/firefox/ffPage.ts b/src/server/firefox/ffPage.ts
index bff14546b23dc..2f3bf24998903 100644
--- a/src/server/firefox/ffPage.ts
+++ b/src/server/firefox/ffPage.ts
@@ -358,7 +358,6 @@ export class FFPage implements PageDelegate {
       file: options.outputFile,
       width: options.width,
       height: options.height,
-      scale: options.scale,
     });
   }
 
diff --git a/src/server/types.ts b/src/server/types.ts
index 9e0ade0638eca..2ed07972171fa 100644
--- a/src/server/types.ts
+++ b/src/server/types.ts
@@ -55,7 +55,6 @@ export type ScreenshotOptions = ElementScreenshotOptions & {
 export type ScreencastOptions = {
   width: number,
   height: number,
-  scale?: number,
 };
 
 export type PageScreencastOptions = ScreencastOptions & {
diff --git a/src/server/webkit/wkPage.ts b/src/server/webkit/wkPage.ts
index 916578ad3d7c9..37a3a7d0f72f7 100644
--- a/src/server/webkit/wkPage.ts
+++ b/src/server/webkit/wkPage.ts
@@ -721,7 +721,6 @@ export class WKPage implements PageDelegate {
         file: options.outputFile,
         width: options.width,
         height: options.height,
-        scale: options.scale,
       }) as any;
       this._browserContext._browser._screencastStarted(screencastId, options.outputFile, this._page);
     } catch (e) {
diff --git a/test/screencast.spec.ts b/test/screencast.spec.ts
index dfe4da55016d3..196658bb7c7d8 100644
--- a/test/screencast.spec.ts
+++ b/test/screencast.spec.ts
@@ -231,18 +231,10 @@ describe('screencast', suite => {
     test.flaky(options.WEBKIT && LINUX);
   }, async ({page, tmpDir, server, videoPlayer, toImpl}) => {
     const videoFile = path.join(tmpDir, 'v.webm');
-    // Chromium automatically fits all frames to fit specified size. To avoid
-    // unwanted transformations we set view port size equal to the screencast
-    // size.
-    // TODO: support explicit 'scale' parameter in CDP.
-    if (options.CHROMIUM)
-      await page.setViewportSize({width: 640, height: 480});
+    // Set viewport equal to screencast frame size to avoid scaling.
+    await page.setViewportSize({width: 640, height: 480});
     await page.goto(server.PREFIX + '/rotate-z.html');
     await toImpl(page)._delegate.startScreencast({outputFile: videoFile, width: 640, height: 480});
-    // TODO: in WebKit figure out why video size is not reported correctly for
-    // static pictures.
-    if (options.HEADLESS && options.WEBKIT)
-      await page.setViewportSize({width: 1270, height: 950});
     // 300 is not enough for Chromium headful.
     await new Promise(r => setTimeout(r, 500));
     await toImpl(page)._delegate.stopScreencast();