diff --git a/Cargo.lock b/Cargo.lock
index 102ca0d9e8c..b5951981f40 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1852,6 +1852,7 @@ version = "0.0.1"
 dependencies = [
  "base",
  "cfg-if",
+ "cookie 0.18.1",
  "crossbeam-channel",
  "euclid",
  "http 1.2.0",
@@ -1862,10 +1863,13 @@ dependencies = [
  "malloc_size_of_derive",
  "num-derive",
  "num-traits",
+ "pixels",
  "serde",
  "servo_malloc_size_of",
  "servo_url",
+ "style_traits",
  "url",
+ "webdriver",
  "webrender_api",
  "webxr-api",
 ]
diff --git a/components/constellation/constellation.rs b/components/constellation/constellation.rs
index 2a199892561..003bdceda3f 100644
--- a/components/constellation/constellation.rs
+++ b/components/constellation/constellation.rs
@@ -116,12 +116,11 @@ use devtools_traits::{
     ChromeToDevtoolsControlMsg, DevtoolsControlMsg, DevtoolsPageInfo, NavigationState,
     ScriptToDevtoolsControlMsg,
 };
-use embedder_traits::input_events::MouseButtonAction;
 use embedder_traits::resources::{self, Resource};
 use embedder_traits::{
     Cursor, EmbedderMsg, EmbedderProxy, ImeEvent, InputEvent, MediaSessionActionType,
-    MediaSessionEvent, MediaSessionPlaybackState, MouseButton, MouseButtonEvent, Theme,
-    TraversalDirection,
+    MediaSessionEvent, MediaSessionPlaybackState, MouseButton, MouseButtonAction, MouseButtonEvent,
+    Theme, TraversalDirection, WebDriverCommandMsg, WebDriverLoadStatus,
 };
 use euclid::default::Size2D as UntypedSize2D;
 use euclid::Size2D;
@@ -139,14 +138,14 @@ use net_traits::{self, IpcSend, ReferrerPolicy, ResourceThreads};
 use profile_traits::{mem, time};
 use script_layout_interface::{LayoutFactory, ScriptThreadFactory};
 use script_traits::{
-    webdriver_msg, AnimationState, AnimationTickType, AuxiliaryBrowsingContextLoadInfo,
-    BroadcastMsg, ConstellationInputEvent, DiscardBrowsingContext, DocumentActivity, DocumentState,
+    AnimationState, AnimationTickType, AuxiliaryBrowsingContextLoadInfo, BroadcastMsg,
+    ConstellationInputEvent, DiscardBrowsingContext, DocumentActivity, DocumentState,
     IFrameLoadInfo, IFrameLoadInfoWithData, IFrameSandboxState, IFrameSizeMsg, Job,
     LayoutMsg as FromLayoutMsg, LoadData, LoadOrigin, LogEntry, MessagePortMsg,
     NavigationHistoryBehavior, PortMessageTask, SWManagerMsg, SWManagerSenders,
     ScriptMsg as FromScriptMsg, ScriptThreadMessage, ScriptToConstellationChan,
     ServiceWorkerManagerFactory, ServiceWorkerMsg, StructuredSerializedData,
-    UpdatePipelineIdReason, WebDriverCommandMsg, WindowSizeData, WindowSizeType,
+    UpdatePipelineIdReason, WindowSizeData, WindowSizeType,
 };
 use serde::{Deserialize, Serialize};
 use servo_config::{opts, pref};
@@ -531,8 +530,8 @@ pub struct InitialConstellationState {
 
 /// Data needed for webdriver
 struct WebDriverData {
-    load_channel: Option<(PipelineId, IpcSender<webdriver_msg::LoadStatus>)>,
-    resize_channel: Option<IpcSender<WindowSizeData>>,
+    load_channel: Option<(PipelineId, IpcSender<WebDriverLoadStatus>)>,
+    resize_channel: Option<IpcSender<Size2D<f32, CSSPixel>>>,
 }
 
 impl WebDriverData {
@@ -2965,7 +2964,7 @@ where
         &mut self,
         url: ServoUrl,
         top_level_browsing_context_id: TopLevelBrowsingContextId,
-        response_sender: Option<IpcSender<webdriver_msg::LoadStatus>>,
+        response_sender: Option<IpcSender<WebDriverLoadStatus>>,
     ) {
         let window_size = self.window_size.initial_viewport;
         let pipeline_id = PipelineId::new();
@@ -3667,7 +3666,7 @@ where
         if let Some((expected_pipeline_id, ref reply_chan)) = self.webdriver.load_channel {
             debug!("Sending load for {:?} to WebDriver", expected_pipeline_id);
             if expected_pipeline_id == pipeline_id {
-                let _ = reply_chan.send(webdriver_msg::LoadStatus::LoadComplete);
+                let _ = reply_chan.send(WebDriverLoadStatus::Complete);
                 webdriver_reset = true;
             }
         }
@@ -4425,7 +4424,7 @@ where
                 self.handle_focus_web_view(top_level_browsing_context_id);
             },
             WebDriverCommandMsg::GetWindowSize(_, response_sender) => {
-                let _ = response_sender.send(self.window_size);
+                let _ = response_sender.send(self.window_size.initial_viewport);
             },
             WebDriverCommandMsg::SetWindowSize(
                 top_level_browsing_context_id,
@@ -4436,11 +4435,16 @@ where
                 self.embedder_proxy
                     .send(EmbedderMsg::ResizeTo(top_level_browsing_context_id, size));
             },
-            WebDriverCommandMsg::LoadUrl(
-                top_level_browsing_context_id,
-                load_data,
-                response_sender,
-            ) => {
+            WebDriverCommandMsg::LoadUrl(top_level_browsing_context_id, url, response_sender) => {
+                let load_data = LoadData::new(
+                    LoadOrigin::WebDriver,
+                    url,
+                    None,
+                    Referrer::NoReferrer,
+                    ReferrerPolicy::EmptyString,
+                    None,
+                    None,
+                );
                 self.load_url_for_webdriver(
                     top_level_browsing_context_id,
                     load_data,
@@ -4699,7 +4703,7 @@ where
         &mut self,
         top_level_browsing_context_id: TopLevelBrowsingContextId,
         load_data: LoadData,
-        response_sender: IpcSender<webdriver_msg::LoadStatus>,
+        response_sender: IpcSender<WebDriverLoadStatus>,
         history_handling: NavigationHistoryBehavior,
     ) {
         let browsing_context_id = BrowsingContextId::from(top_level_browsing_context_id);
@@ -4725,7 +4729,7 @@ where
             );
             self.webdriver.load_channel = Some((new_pipeline_id, response_sender));
         } else {
-            let _ = response_sender.send(webdriver_msg::LoadStatus::LoadCanceled);
+            let _ = response_sender.send(WebDriverLoadStatus::Canceled);
         }
     }
 
@@ -5037,7 +5041,7 @@ where
         self.resize_browsing_context(new_size, size_type, browsing_context_id);
 
         if let Some(response_sender) = self.webdriver.resize_channel.take() {
-            let _ = response_sender.send(new_size);
+            let _ = response_sender.send(new_size.initial_viewport);
         }
 
         self.window_size = new_size;
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 08b803b6106..be037dcab7f 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -25,7 +25,10 @@ use crossbeam_channel::{unbounded, Sender};
 use cssparser::{Parser, ParserInput, SourceLocation};
 use devtools_traits::{ScriptToDevtoolsControlMsg, TimelineMarker, TimelineMarkerType};
 use dom_struct::dom_struct;
-use embedder_traits::{EmbedderMsg, PromptDefinition, PromptOrigin, PromptResult, Theme};
+use embedder_traits::{
+    EmbedderMsg, PromptDefinition, PromptOrigin, PromptResult, Theme, WebDriverJSError,
+    WebDriverJSResult,
+};
 use euclid::default::{Point2D as UntypedPoint2D, Rect as UntypedRect};
 use euclid::{Point2D, Rect, Scale, Size2D, Vector2D};
 use fonts::FontContext;
@@ -56,7 +59,6 @@ use script_layout_interface::{
     combine_id_with_fragment_type, FragmentType, Layout, PendingImageState, QueryMsg, Reflow,
     ReflowGoal, ReflowRequest, TrustedNodeAddress,
 };
-use script_traits::webdriver_msg::{WebDriverJSError, WebDriverJSResult};
 use script_traits::{
     DocumentState, LoadData, LoadOrigin, NavigationHistoryBehavior, ScriptMsg, ScriptThreadMessage,
     ScriptToConstellationChan, ScrollState, StructuredSerializedData, WindowSizeData,
diff --git a/components/script/script_thread.rs b/components/script/script_thread.rs
index 34b212ed9fb..e0998db7b2b 100644
--- a/components/script/script_thread.rs
+++ b/components/script/script_thread.rs
@@ -45,7 +45,9 @@ use devtools_traits::{
     CSSError, DevtoolScriptControlMsg, DevtoolsPageInfo, NavigationState,
     ScriptToDevtoolsControlMsg, WorkerId,
 };
-use embedder_traits::{EmbedderMsg, InputEvent, MediaSessionActionType, Theme};
+use embedder_traits::{
+    EmbedderMsg, InputEvent, MediaSessionActionType, Theme, WebDriverScriptCommand,
+};
 use euclid::default::Rect;
 use fonts::{FontContext, SystemFontServiceProxy};
 use headers::{HeaderMapExt, LastModified, ReferrerPolicy as ReferrerPolicyHeader};
@@ -77,7 +79,6 @@ use profile_traits::time_profile;
 use script_layout_interface::{
     node_id_from_scroll_id, LayoutConfig, LayoutFactory, ReflowGoal, ScriptThreadFactory,
 };
-use script_traits::webdriver_msg::WebDriverScriptCommand;
 use script_traits::{
     ConstellationInputEvent, DiscardBrowsingContext, DocumentActivity, EventResult,
     InitialScriptState, JsEvalResult, LoadData, LoadOrigin, NavigationHistoryBehavior,
diff --git a/components/script/webdriver_handlers.rs b/components/script/webdriver_handlers.rs
index d0cda4c78e0..cb2b381900a 100644
--- a/components/script/webdriver_handlers.rs
+++ b/components/script/webdriver_handlers.rs
@@ -8,6 +8,9 @@ use std::ffi::CString;
 
 use base::id::{BrowsingContextId, PipelineId};
 use cookie::Cookie;
+use embedder_traits::{
+    WebDriverCookieError, WebDriverFrameId, WebDriverJSError, WebDriverJSResult, WebDriverJSValue,
+};
 use euclid::default::{Point2D, Rect, Size2D};
 use hyper_serde::Serde;
 use ipc_channel::ipc::{self, IpcSender};
@@ -21,9 +24,6 @@ use js::rust::{HandleObject, HandleValue, IdVector};
 use net_traits::CookieSource::{NonHTTP, HTTP};
 use net_traits::CoreResourceMsg::{DeleteCookies, GetCookiesDataForUrl, SetCookieForUrl};
 use net_traits::IpcSend;
-use script_traits::webdriver_msg::{
-    WebDriverCookieError, WebDriverFrameId, WebDriverJSError, WebDriverJSResult, WebDriverJSValue,
-};
 use servo_url::ServoUrl;
 use webdriver::common::{WebElement, WebFrame, WebWindow};
 use webdriver::error::ErrorStatus;
diff --git a/components/shared/compositing/constellation_msg.rs b/components/shared/compositing/constellation_msg.rs
index 7165d40ccf5..55fd0ce5a05 100644
--- a/components/shared/compositing/constellation_msg.rs
+++ b/components/shared/compositing/constellation_msg.rs
@@ -8,11 +8,11 @@ use std::time::Duration;
 
 use base::id::{BrowsingContextId, PipelineId, TopLevelBrowsingContextId, WebViewId};
 use base::Epoch;
-use embedder_traits::{Cursor, InputEvent, MediaSessionActionType, Theme, TraversalDirection};
-use ipc_channel::ipc::IpcSender;
-use script_traits::{
-    AnimationTickType, LogEntry, WebDriverCommandMsg, WindowSizeData, WindowSizeType,
+use embedder_traits::{
+    Cursor, InputEvent, MediaSessionActionType, Theme, TraversalDirection, WebDriverCommandMsg,
 };
+use ipc_channel::ipc::IpcSender;
+use script_traits::{AnimationTickType, LogEntry, WindowSizeData, WindowSizeType};
 use servo_url::ServoUrl;
 use webrender_traits::CompositorHitTestResult;
 
diff --git a/components/shared/embedder/Cargo.toml b/components/shared/embedder/Cargo.toml
index 3bb8a5ee83c..e950e9ff99a 100644
--- a/components/shared/embedder/Cargo.toml
+++ b/components/shared/embedder/Cargo.toml
@@ -17,6 +17,7 @@ webxr = ["dep:webxr-api"]
 [dependencies]
 base = { workspace = true }
 cfg-if = { workspace = true }
+cookie = { workspace = true }
 crossbeam-channel = { workspace = true }
 euclid = { workspace = true }
 http = { workspace = true }
@@ -28,8 +29,11 @@ num-derive = "0.4"
 malloc_size_of = { workspace = true }
 malloc_size_of_derive = { workspace = true }
 num-traits = { workspace = true }
+pixels = { path = "../../pixels" }
 serde = { workspace = true }
 servo_url = { path = "../../url" }
+style_traits = { workspace = true }
 url = { workspace = true }
+webdriver = { workspace = true }
 webrender_api = { workspace = true }
 webxr-api = { workspace = true, features = ["ipc"], optional = true }
diff --git a/components/shared/embedder/lib.rs b/components/shared/embedder/lib.rs
index 071ad16be71..080853d4d9d 100644
--- a/components/shared/embedder/lib.rs
+++ b/components/shared/embedder/lib.rs
@@ -4,6 +4,7 @@
 
 pub mod input_events;
 pub mod resources;
+mod webdriver;
 
 use std::fmt::{Debug, Error, Formatter};
 use std::path::PathBuf;
@@ -22,6 +23,7 @@ use url::Url;
 use webrender_api::units::{DeviceIntPoint, DeviceIntRect, DeviceIntSize};
 
 pub use crate::input_events::*;
+pub use crate::webdriver::*;
 
 /// Tracks whether Servo isn't shutting down, is in the process of shutting down,
 /// or has finished shutting down.
diff --git a/components/shared/script/webdriver_msg.rs b/components/shared/embedder/webdriver.rs
similarity index 62%
rename from components/shared/script/webdriver_msg.rs
rename to components/shared/embedder/webdriver.rs
index 31869fede17..b312339c08a 100644
--- a/components/shared/script/webdriver_msg.rs
+++ b/components/shared/embedder/webdriver.rs
@@ -6,15 +6,66 @@
 
 use std::collections::HashMap;
 
-use base::id::BrowsingContextId;
+use base::id::{BrowsingContextId, WebViewId};
 use cookie::Cookie;
-use euclid::default::Rect;
+use euclid::default::Rect as UntypedRect;
+use euclid::{Rect, Size2D};
 use hyper_serde::Serde;
 use ipc_channel::ipc::IpcSender;
+use keyboard_types::webdriver::Event as WebDriverInputEvent;
+use keyboard_types::KeyboardEvent;
+use pixels::Image;
 use serde::{Deserialize, Serialize};
 use servo_url::ServoUrl;
+use style_traits::CSSPixel;
 use webdriver::common::{WebElement, WebFrame, WebWindow};
 use webdriver::error::ErrorStatus;
+use webrender_api::units::DeviceIntSize;
+
+use crate::{MouseButton, MouseButtonAction};
+
+/// Messages to the constellation originating from the WebDriver server.
+#[derive(Debug, Deserialize, Serialize)]
+pub enum WebDriverCommandMsg {
+    /// Get the window size.
+    GetWindowSize(WebViewId, IpcSender<Size2D<f32, CSSPixel>>),
+    /// Load a URL in the top-level browsing context with the given ID.
+    LoadUrl(WebViewId, ServoUrl, IpcSender<WebDriverLoadStatus>),
+    /// Refresh the top-level browsing context with the given ID.
+    Refresh(WebViewId, IpcSender<WebDriverLoadStatus>),
+    /// Pass a webdriver command to the script thread of the current pipeline
+    /// of a browsing context.
+    ScriptCommand(BrowsingContextId, WebDriverScriptCommand),
+    /// Act as if keys were pressed in the browsing context with the given ID.
+    SendKeys(BrowsingContextId, Vec<WebDriverInputEvent>),
+    /// Act as if keys were pressed or release in the browsing context with the given ID.
+    KeyboardAction(BrowsingContextId, KeyboardEvent),
+    /// Act as if the mouse was clicked in the browsing context with the given ID.
+    MouseButtonAction(MouseButtonAction, MouseButton, f32, f32),
+    /// Act as if the mouse was moved in the browsing context with the given ID.
+    MouseMoveAction(f32, f32),
+    /// Set the window size.
+    SetWindowSize(WebViewId, DeviceIntSize, IpcSender<Size2D<f32, CSSPixel>>),
+    /// Take a screenshot of the window.
+    TakeScreenshot(
+        WebViewId,
+        Option<Rect<f32, CSSPixel>>,
+        IpcSender<Option<Image>>,
+    ),
+    /// Create a new webview that loads about:blank. The constellation will use
+    /// the provided channels to return the top level browsing context id
+    /// associated with the new webview, and a notification when the initial
+    /// load is complete.
+    NewWebView(
+        WebViewId,
+        IpcSender<WebViewId>,
+        IpcSender<WebDriverLoadStatus>,
+    ),
+    /// Close the webview associated with the provided id.
+    CloseWebView(WebViewId),
+    /// Focus the webview associated with the provided id.
+    FocusWebView(WebViewId),
+}
 
 #[derive(Debug, Deserialize, Serialize)]
 pub enum WebDriverScriptCommand {
@@ -75,11 +126,11 @@ pub enum WebDriverScriptCommand {
         IpcSender<Result<WebDriverJSValue, ErrorStatus>>,
     ),
     GetElementCSS(String, String, IpcSender<Result<String, ErrorStatus>>),
-    GetElementRect(String, IpcSender<Result<Rect<f64>, ErrorStatus>>),
+    GetElementRect(String, IpcSender<Result<UntypedRect<f64>, ErrorStatus>>),
     GetElementTagName(String, IpcSender<Result<String, ErrorStatus>>),
     GetElementText(String, IpcSender<Result<String, ErrorStatus>>),
     GetElementInViewCenterPoint(String, IpcSender<Result<Option<(i64, i64)>, ErrorStatus>>),
-    GetBoundingClientRect(String, IpcSender<Result<Rect<f32>, ErrorStatus>>),
+    GetBoundingClientRect(String, IpcSender<Result<UntypedRect<f32>, ErrorStatus>>),
     GetBrowsingContextId(
         WebDriverFrameId,
         IpcSender<Result<BrowsingContextId, ErrorStatus>>,
@@ -133,8 +184,8 @@ pub enum WebDriverFrameId {
 }
 
 #[derive(Debug, Deserialize, Serialize)]
-pub enum LoadStatus {
-    LoadComplete,
-    LoadTimeout,
-    LoadCanceled,
+pub enum WebDriverLoadStatus {
+    Complete,
+    Timeout,
+    Canceled,
 }
diff --git a/components/shared/script/lib.rs b/components/shared/script/lib.rs
index 5c46dc01bef..5c85f473b6e 100644
--- a/components/shared/script/lib.rs
+++ b/components/shared/script/lib.rs
@@ -12,7 +12,6 @@
 mod script_msg;
 pub mod serializable;
 pub mod transferable;
-pub mod webdriver_msg;
 
 use std::borrow::Cow;
 use std::collections::{HashMap, VecDeque};
@@ -23,7 +22,7 @@ use background_hang_monitor_api::BackgroundHangMonitorRegister;
 use base::cross_process_instant::CrossProcessInstant;
 use base::id::{
     BlobId, BrowsingContextId, HistoryStateId, MessagePortId, PipelineId, PipelineNamespaceId,
-    TopLevelBrowsingContextId, WebViewId,
+    TopLevelBrowsingContextId,
 };
 use base::Epoch;
 use bitflags::bitflags;
@@ -33,13 +32,11 @@ use canvas_traits::webgl::WebGLPipeline;
 use crossbeam_channel::{RecvTimeoutError, Sender};
 use devtools_traits::{DevtoolScriptControlMsg, ScriptToDevtoolsControlMsg, WorkerId};
 use embedder_traits::input_events::InputEvent;
-use embedder_traits::{MediaSessionActionType, MouseButton, MouseButtonAction, Theme};
+use embedder_traits::{MediaSessionActionType, Theme, WebDriverScriptCommand};
 use euclid::{Rect, Scale, Size2D, UnknownUnit, Vector2D};
 use http::{HeaderMap, Method};
 use ipc_channel::ipc::{IpcReceiver, IpcSender};
 use ipc_channel::Error as IpcError;
-use keyboard_types::webdriver::Event as WebDriverInputEvent;
-use keyboard_types::KeyboardEvent;
 use libc::c_void;
 use log::warn;
 use malloc_size_of::malloc_size_of_is_0;
@@ -49,7 +46,7 @@ use net_traits::image_cache::ImageCache;
 use net_traits::request::{InsecureRequestsPolicy, Referrer, RequestBody};
 use net_traits::storage_thread::StorageType;
 use net_traits::{ReferrerPolicy, ResourceThreads};
-use pixels::{Image, PixelFormat};
+use pixels::PixelFormat;
 use profile_traits::{mem, time as profile_time};
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
 use servo_atoms::Atom;
@@ -57,7 +54,7 @@ use servo_url::{ImmutableOrigin, ServoUrl};
 use style_traits::{CSSPixel, SpeculativePainter};
 #[cfg(feature = "webgpu")]
 use webgpu::WebGPUMsg;
-use webrender_api::units::{DeviceIntSize, DevicePixel, LayoutPixel};
+use webrender_api::units::{DevicePixel, LayoutPixel};
 use webrender_api::{DocumentId, ExternalScrollId, ImageKey};
 use webrender_traits::{
     CompositorHitTestResult, CrossProcessCompositorApi,
@@ -70,7 +67,6 @@ pub use crate::script_msg::{
 };
 use crate::serializable::{BlobData, BlobImpl};
 use crate::transferable::MessagePortImpl;
-use crate::webdriver_msg::{LoadStatus, WebDriverScriptCommand};
 
 /// The address of a node. Layout sends these back. They must be validated via
 /// `from_untrusted_node_address` before they can be used, because we do not trust layout.
@@ -652,53 +648,6 @@ pub enum WindowSizeType {
     Resize,
 }
 
-/// Messages to the constellation originating from the WebDriver server.
-#[derive(Debug, Deserialize, Serialize)]
-pub enum WebDriverCommandMsg {
-    /// Get the window size.
-    GetWindowSize(TopLevelBrowsingContextId, IpcSender<WindowSizeData>),
-    /// Load a URL in the top-level browsing context with the given ID.
-    LoadUrl(TopLevelBrowsingContextId, LoadData, IpcSender<LoadStatus>),
-    /// Refresh the top-level browsing context with the given ID.
-    Refresh(TopLevelBrowsingContextId, IpcSender<LoadStatus>),
-    /// Pass a webdriver command to the script thread of the current pipeline
-    /// of a browsing context.
-    ScriptCommand(BrowsingContextId, WebDriverScriptCommand),
-    /// Act as if keys were pressed in the browsing context with the given ID.
-    SendKeys(BrowsingContextId, Vec<WebDriverInputEvent>),
-    /// Act as if keys were pressed or release in the browsing context with the given ID.
-    KeyboardAction(BrowsingContextId, KeyboardEvent),
-    /// Act as if the mouse was clicked in the browsing context with the given ID.
-    MouseButtonAction(MouseButtonAction, MouseButton, f32, f32),
-    /// Act as if the mouse was moved in the browsing context with the given ID.
-    MouseMoveAction(f32, f32),
-    /// Set the window size.
-    SetWindowSize(
-        TopLevelBrowsingContextId,
-        DeviceIntSize,
-        IpcSender<WindowSizeData>,
-    ),
-    /// Take a screenshot of the window.
-    TakeScreenshot(
-        TopLevelBrowsingContextId,
-        Option<Rect<f32, CSSPixel>>,
-        IpcSender<Option<Image>>,
-    ),
-    /// Create a new webview that loads about:blank. The constellation will use
-    /// the provided channels to return the top level browsing context id
-    /// associated with the new webview, and a notification when the initial
-    /// load is complete.
-    NewWebView(
-        WebViewId,
-        IpcSender<TopLevelBrowsingContextId>,
-        IpcSender<LoadStatus>,
-    ),
-    /// Close the webview associated with the provided id.
-    CloseWebView(TopLevelBrowsingContextId),
-    /// Focus the webview associated with the provided id.
-    FocusWebView(TopLevelBrowsingContextId),
-}
-
 /// Resources required by workerglobalscopes
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct WorkerGlobalScopeInit {
diff --git a/components/webdriver_server/actions.rs b/components/webdriver_server/actions.rs
index c079b699fa9..26399ff5db9 100644
--- a/components/webdriver_server/actions.rs
+++ b/components/webdriver_server/actions.rs
@@ -7,11 +7,9 @@ use std::time::{Duration, Instant};
 use std::{cmp, thread};
 
 use compositing_traits::ConstellationMsg;
-use embedder_traits::MouseButtonAction;
+use embedder_traits::{MouseButtonAction, WebDriverCommandMsg, WebDriverScriptCommand};
 use ipc_channel::ipc;
 use keyboard_types::webdriver::KeyInputState;
-use script_traits::webdriver_msg::WebDriverScriptCommand;
-use script_traits::WebDriverCommandMsg;
 use webdriver::actions::{
     ActionSequence, ActionsType, GeneralAction, KeyAction, KeyActionItem, KeyDownAction,
     KeyUpAction, NullActionItem, PointerAction, PointerActionItem, PointerActionParameters,
@@ -398,8 +396,8 @@ impl Handler {
             .unwrap();
 
         // Steps 7 - 8
-        let viewport = receiver.recv().unwrap().initial_viewport;
-        if x < 0 || x as f32 > viewport.width || y < 0 || y as f32 > viewport.height {
+        let viewport_size = receiver.recv().unwrap();
+        if x < 0 || x as f32 > viewport_size.width || y < 0 || y as f32 > viewport_size.height {
             return Err(ErrorStatus::MoveTargetOutOfBounds);
         }
 
diff --git a/components/webdriver_server/lib.rs b/components/webdriver_server/lib.rs
index fb574ec902c..3e4c063351a 100644
--- a/components/webdriver_server/lib.rs
+++ b/components/webdriver_server/lib.rs
@@ -22,7 +22,11 @@ use capabilities::ServoCapabilities;
 use compositing_traits::ConstellationMsg;
 use cookie::{CookieBuilder, Expiration};
 use crossbeam_channel::{after, select, unbounded, Receiver, Sender};
-use embedder_traits::TraversalDirection;
+use embedder_traits::{
+    TraversalDirection, WebDriverCommandMsg, WebDriverCookieError, WebDriverFrameId,
+    WebDriverJSError, WebDriverJSResult, WebDriverJSValue, WebDriverLoadStatus,
+    WebDriverScriptCommand,
+};
 use euclid::{Rect, Size2D};
 use http::method::Method;
 use image::{DynamicImage, ImageFormat, RgbaImage};
@@ -30,14 +34,7 @@ use ipc_channel::ipc::{self, IpcSender};
 use ipc_channel::router::ROUTER;
 use keyboard_types::webdriver::send_keys;
 use log::{debug, info};
-use net_traits::request::Referrer;
-use net_traits::ReferrerPolicy;
 use pixels::PixelFormat;
-use script_traits::webdriver_msg::{
-    LoadStatus, WebDriverCookieError, WebDriverFrameId, WebDriverJSError, WebDriverJSResult,
-    WebDriverJSValue, WebDriverScriptCommand,
-};
-use script_traits::{LoadData, LoadOrigin, WebDriverCommandMsg};
 use serde::de::{Deserializer, MapAccess, Visitor};
 use serde::ser::Serializer;
 use serde::{Deserialize, Serialize};
@@ -189,11 +186,11 @@ struct Handler {
     /// The threaded receiver on which we can block for a load-status.
     /// It will receive messages sent on the load_status_sender,
     /// and forwarded by the IPC router.
-    load_status_receiver: Receiver<LoadStatus>,
+    load_status_receiver: Receiver<WebDriverLoadStatus>,
     /// The IPC sender which we can clone and pass along to the constellation,
     /// for it to send us a load-status. Messages sent on it
     /// will be forwarded to the load_status_receiver.
-    load_status_sender: IpcSender<LoadStatus>,
+    load_status_sender: IpcSender<WebDriverLoadStatus>,
     session: Option<WebDriverSession>,
     constellation_chan: Sender<ConstellationMsg>,
     resize_timeout: u32,
@@ -662,18 +659,9 @@ impl Handler {
 
         let top_level_browsing_context_id = self.session()?.top_level_browsing_context_id;
 
-        let load_data = LoadData::new(
-            LoadOrigin::WebDriver,
-            url,
-            None,
-            Referrer::NoReferrer,
-            ReferrerPolicy::EmptyString,
-            None,
-            None,
-        );
         let cmd_msg = WebDriverCommandMsg::LoadUrl(
             top_level_browsing_context_id,
-            load_data,
+            url,
             self.load_status_sender.clone(),
         );
         self.constellation_chan
@@ -717,12 +705,11 @@ impl Handler {
             .unwrap();
 
         let window_size = receiver.recv().unwrap();
-        let vp = window_size.initial_viewport;
         let window_size_response = WindowRectResponse {
             x: 0,
             y: 0,
-            width: vp.width as i32,
-            height: vp.height as i32,
+            width: window_size.width as i32,
+            height: window_size.height as i32,
         };
         Ok(WebDriverResponse::WindowRect(window_size_response))
     }
@@ -766,12 +753,11 @@ impl Handler {
         });
 
         let window_size = receiver.recv().unwrap();
-        let vp = window_size.initial_viewport;
         let window_size_response = WindowRectResponse {
             x: 0,
             y: 0,
-            width: vp.width as i32,
-            height: vp.height as i32,
+            width: window_size.width as i32,
+            height: window_size.height as i32,
         };
         Ok(WebDriverResponse::WindowRect(window_size_response))
     }