diff --git a/additions/juggler/TargetRegistry.js b/additions/juggler/TargetRegistry.js
index 77277ad..4a73580 100644
--- a/additions/juggler/TargetRegistry.js
+++ b/additions/juggler/TargetRegistry.js
@@ -394,7 +394,6 @@ class PageTarget {
         height: ChromeUtils.camouGetInt("window.innerHeight") || 720,
       };
     }
-    this._zoom = 1;
     this._initialDPPX = this._linkedBrowser.browsingContext.overrideDPPX;
     this._url = 'about:blank';
     this._openerId = opener ? opener.id() : undefined;
@@ -507,7 +506,6 @@ class PageTarget {
     this.updateUserAgent(browsingContext);
     this.updatePlatform(browsingContext);
     this.updateDPPXOverride(browsingContext);
-    this.updateZoom(browsingContext);
     this.updateEmulatedMedia(browsingContext);
     this.updateColorSchemeOverride(browsingContext);
     this.updateReducedMotionOverride(browsingContext);
@@ -546,16 +544,7 @@ class PageTarget {
   }
 
   updateDPPXOverride(browsingContext = undefined) {
-    browsingContext ||= this._linkedBrowser.browsingContext;
-    const dppx = this._zoom * (this._browserContext.deviceScaleFactor || this._initialDPPX);
-    browsingContext.overrideDPPX = dppx;
-  }
-
-  async updateZoom(browsingContext = undefined) {
-    browsingContext ||= this._linkedBrowser.browsingContext;
-    // Update dpr first, and then UI zoom.
-    this.updateDPPXOverride(browsingContext);
-    browsingContext.fullZoom = this._zoom;
+    (browsingContext || this._linkedBrowser.browsingContext).overrideDPPX = this._browserContext.deviceScaleFactor || this._initialDPPX;
   }
 
   _updateModalDialogs() {
@@ -617,7 +606,7 @@ class PageTarget {
       const toolbarTop = stackRect.y;
       this._window.resizeBy(width - this._window.innerWidth, height + toolbarTop - this._window.innerHeight);
 
-      await this._channel.connect('').send('awaitViewportDimensions', { width: width / this._zoom, height: height / this._zoom });
+      await this._channel.connect('').send('awaitViewportDimensions', { width, height });
     } else {
       this._linkedBrowser.style.removeProperty('width');
       this._linkedBrowser.style.removeProperty('height');
@@ -629,8 +618,8 @@ class PageTarget {
 
       const actualSize = this._linkedBrowser.getBoundingClientRect();
       await this._channel.connect('').send('awaitViewportDimensions', {
-        width: actualSize.width / this._zoom,
-        height: actualSize.height / this._zoom,
+        width: actualSize.width,
+        height: actualSize.height,
       });
     }
   }
@@ -682,14 +671,6 @@ class PageTarget {
     this._viewportSize = viewportSize;
     await this.updateViewportSize();
   }
-  
-  async setZoom(zoom) {
-    // This is default range from the ZoomManager.
-    if (zoom < 0.3 || zoom > 5)
-      throw new Error('Invalid zoom value, must be between 0.3 and 5');
-    this._zoom = zoom;
-    await this.updateZoom();
-  }
 
   close(runBeforeUnload = false) {
     this._gBrowser.removeTab(this._tab, {
diff --git a/additions/juggler/protocol/BrowserHandler.js b/additions/juggler/protocol/BrowserHandler.js
index 6a4688e..81aeee4 100644
--- a/additions/juggler/protocol/BrowserHandler.js
+++ b/additions/juggler/protocol/BrowserHandler.js
@@ -219,6 +219,10 @@ class BrowserHandler {
     await this._targetRegistry.browserContextForId(browserContextId).setForcedColors(nullToUndefined(forcedColors));
   }
 
+  async ['Browser.setContrast']({browserContextId, contrast}) {
+    return;  // TODO: Implement
+  }
+
   async ['Browser.setVideoRecordingOptions']({browserContextId, options}) {
     await this._targetRegistry.browserContextForId(browserContextId).setVideoRecordingOptions(options);
   }
diff --git a/additions/juggler/protocol/PageHandler.js b/additions/juggler/protocol/PageHandler.js
index 6a2fac9..213ede0 100644
--- a/additions/juggler/protocol/PageHandler.js
+++ b/additions/juggler/protocol/PageHandler.js
@@ -250,10 +250,6 @@ class PageHandler {
     await this._pageTarget.setViewportSize(viewportSize === null ? undefined : viewportSize);
   }
 
-  async ['Page.setZoom']({zoom}) {
-    await this._pageTarget.setZoom(zoom);
-  }
-
   async ['Runtime.evaluate'](options) {
     return await this._contentPage.send('evaluate', options);
   }
diff --git a/additions/juggler/protocol/Protocol.js b/additions/juggler/protocol/Protocol.js
index 6fa3dc8..08ca173 100644
--- a/additions/juggler/protocol/Protocol.js
+++ b/additions/juggler/protocol/Protocol.js
@@ -463,6 +463,12 @@ const Browser = {
         forcedColors: t.Nullable(t.Enum(['active', 'none'])),
       },
     },
+    'setContrast': {
+      params: {
+        browserContextId: t.Optional(t.String),
+        contrast: t.Nullable(t.Enum(['less', 'more', 'custom', 'no-preference'])),
+      },
+    },
     'setVideoRecordingOptions': {
       params: {
         browserContextId: t.Optional(t.String),
@@ -794,11 +800,6 @@ const Page = {
         viewportSize: t.Nullable(pageTypes.Size),
       },
     },
-    'setZoom': {
-      params: {
-        zoom: t.Number,
-      },
-    },
     'bringToFront': {
       params: {
       },
diff --git a/additions/juggler/screencast/nsScreencastService.cpp b/additions/juggler/screencast/nsScreencastService.cpp
index f33294b..062a851 100644
--- a/additions/juggler/screencast/nsScreencastService.cpp
+++ b/additions/juggler/screencast/nsScreencastService.cpp
@@ -343,17 +343,10 @@ nsresult nsScreencastService::StartVideoRecording(nsIScreencastServiceClient* aC
     return NS_ERROR_FAILURE;
 
   gfx::IntMargin margin;
-  // Screen bounds is the widget location on screen.
-  auto screenBounds = widget->GetScreenBounds().ToUnknownRect();
-  // Client bounds is the content location, in terms of parent widget.
-  // To use it, we need to translate it to screen coordinates first.
+  auto bounds = widget->GetScreenBounds().ToUnknownRect();
   auto clientBounds = widget->GetClientBounds().ToUnknownRect();
-  for (auto parent = widget->GetParent(); parent != nullptr; parent = parent->GetParent()) {
-    auto pb = parent->GetClientBounds().ToUnknownRect();
-    clientBounds.MoveBy(pb.X(), pb.Y());
-  }
   // Crop the image to exclude frame (if any).
-  margin = screenBounds - clientBounds;
+  margin = bounds - clientBounds;
   // Crop the image to exclude controls.
   margin.top += offsetTop;
 
@@ -398,4 +391,4 @@ nsresult nsScreencastService::ScreencastFrameAck(const nsAString& aSessionId) {
   return NS_OK;
 }
 
-}  // namespace mozilla
\ No newline at end of file
+}  // namespace mozilla