diff --git a/Cargo.lock b/Cargo.lock
index fc1c351d2e15..396adc979c72 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1895,7 +1895,6 @@ dependencies = [
  "raw-window-handle",
  "smallvec 1.3.0",
  "winapi",
- "x11",
 ]
 
 [[package]]
@@ -6592,7 +6591,7 @@ dependencies = [
 [[package]]
 name = "wgpu-core"
 version = "0.5.0"
-source = "git+https://github.com/gfx-rs/wgpu#a203333c3e144cfd431c812213966ee32ae59d98"
+source = "git+https://github.com/gfx-rs/wgpu#ac9587e9ced5b043abad68e260cb8c9e812cffb5"
 dependencies = [
  "arrayvec 0.5.1",
  "bitflags",
@@ -6621,7 +6620,7 @@ dependencies = [
 [[package]]
 name = "wgpu-types"
 version = "0.5.0"
-source = "git+https://github.com/gfx-rs/wgpu#a203333c3e144cfd431c812213966ee32ae59d98"
+source = "git+https://github.com/gfx-rs/wgpu#ac9587e9ced5b043abad68e260cb8c9e812cffb5"
 dependencies = [
  "bitflags",
  "peek-poke 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/components/script/dom/gpuadapter.rs b/components/script/dom/gpuadapter.rs
index 8420a0058fc8..7947a0693352 100644
--- a/components/script/dom/gpuadapter.rs
+++ b/components/script/dom/gpuadapter.rs
@@ -39,8 +39,8 @@ impl GPUAdapter {
         name: DOMString,
         extensions: Heap<*mut JSObject>,
         adapter: WebGPUAdapter,
-    ) -> GPUAdapter {
-        GPUAdapter {
+    ) -> Self {
+        Self {
             reflector_: Reflector::new(),
             channel,
             name,
@@ -55,7 +55,7 @@ impl GPUAdapter {
         name: DOMString,
         extensions: Heap<*mut JSObject>,
         adapter: WebGPUAdapter,
-    ) -> DomRoot<GPUAdapter> {
+    ) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUAdapter::new_inherited(
                 channel, name, extensions, adapter,
@@ -81,9 +81,7 @@ impl GPUAdapterMethods for GPUAdapter {
         let promise = Promise::new_in_current_realm(&self.global(), comp);
         let sender = response_async(&promise, self);
         let desc = wgt::DeviceDescriptor {
-            extensions: wgt::Extensions {
-                anisotropic_filtering: descriptor.extensions.anisotropicFiltering,
-            },
+            extensions: wgt::Extensions::empty(),
             limits: wgt::Limits {
                 max_bind_groups: descriptor.limits.maxBindGroups,
             },
diff --git a/components/script/dom/gpubindgroup.rs b/components/script/dom/gpubindgroup.rs
index b7b8cadeacfd..4767d28d0f16 100644
--- a/components/script/dom/gpubindgroup.rs
+++ b/components/script/dom/gpubindgroup.rs
@@ -21,7 +21,7 @@ pub struct GPUBindGroup {
 }
 
 impl GPUBindGroup {
-    fn new_inherited(bind_group: WebGPUBindGroup, valid: bool) -> GPUBindGroup {
+    fn new_inherited(bind_group: WebGPUBindGroup, valid: bool) -> Self {
         Self {
             reflector_: Reflector::new(),
             label: DomRefCell::new(None),
@@ -30,11 +30,7 @@ impl GPUBindGroup {
         }
     }
 
-    pub fn new(
-        global: &GlobalScope,
-        bind_group: WebGPUBindGroup,
-        valid: bool,
-    ) -> DomRoot<GPUBindGroup> {
+    pub fn new(global: &GlobalScope, bind_group: WebGPUBindGroup, valid: bool) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUBindGroup::new_inherited(bind_group, valid)),
             global,
diff --git a/components/script/dom/gpubindgrouplayout.rs b/components/script/dom/gpubindgrouplayout.rs
index c57fc2723287..8c1412562617 100644
--- a/components/script/dom/gpubindgrouplayout.rs
+++ b/components/script/dom/gpubindgrouplayout.rs
@@ -32,7 +32,7 @@ impl GPUBindGroupLayout {
         bind_group_layout: WebGPUBindGroupLayout,
         bindings: Vec<GPUBindGroupLayoutEntry>,
         valid: bool,
-    ) -> GPUBindGroupLayout {
+    ) -> Self {
         Self {
             reflector_: Reflector::new(),
             channel,
@@ -49,7 +49,7 @@ impl GPUBindGroupLayout {
         bind_group_layout: WebGPUBindGroupLayout,
         bindings: Vec<GPUBindGroupLayoutEntry>,
         valid: bool,
-    ) -> DomRoot<GPUBindGroupLayout> {
+    ) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUBindGroupLayout::new_inherited(
                 channel,
diff --git a/components/script/dom/gpubuffer.rs b/components/script/dom/gpubuffer.rs
index 643fbfc98c7c..1c756dae15f5 100644
--- a/components/script/dom/gpubuffer.rs
+++ b/components/script/dom/gpubuffer.rs
@@ -57,7 +57,7 @@ impl GPUBuffer {
         usage: u32,
         valid: bool,
         mapping: RootedTraceableBox<Heap<*mut JSObject>>,
-    ) -> GPUBuffer {
+    ) -> Self {
         Self {
             reflector_: Reflector::new(),
             channel,
@@ -83,7 +83,7 @@ impl GPUBuffer {
         usage: u32,
         valid: bool,
         mapping: RootedTraceableBox<Heap<*mut JSObject>>,
-    ) -> DomRoot<GPUBuffer> {
+    ) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUBuffer::new_inherited(
                 channel, buffer, device, state, size, usage, valid, mapping,
diff --git a/components/script/dom/gpucommandbuffer.rs b/components/script/dom/gpucommandbuffer.rs
index b1871051e523..4b23a622ca34 100644
--- a/components/script/dom/gpucommandbuffer.rs
+++ b/components/script/dom/gpucommandbuffer.rs
@@ -37,8 +37,8 @@ impl GPUCommandBuffer {
         channel: WebGPU,
         command_buffer: WebGPUCommandBuffer,
         buffers: HashSet<DomRoot<GPUBuffer>>,
-    ) -> GPUCommandBuffer {
-        GPUCommandBuffer {
+    ) -> Self {
+        Self {
             channel,
             reflector_: Reflector::new(),
             label: DomRefCell::new(None),
@@ -52,7 +52,7 @@ impl GPUCommandBuffer {
         channel: WebGPU,
         command_buffer: WebGPUCommandBuffer,
         buffers: HashSet<DomRoot<GPUBuffer>>,
-    ) -> DomRoot<GPUCommandBuffer> {
+    ) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUCommandBuffer::new_inherited(
                 channel,
diff --git a/components/script/dom/gpucommandencoder.rs b/components/script/dom/gpucommandencoder.rs
index 6fcd1bc23b62..d0ba2dc8624b 100644
--- a/components/script/dom/gpucommandencoder.rs
+++ b/components/script/dom/gpucommandencoder.rs
@@ -192,12 +192,14 @@ impl GPUCommandEncoderMethods for GPUCommandEncoder {
                     GPUStoreOp::Clear => wgt::StoreOp::Clear,
                 },
                 clear_depth,
+                depth_read_only: depth.depthReadOnly,
                 stencil_load_op,
                 stencil_store_op: match depth.stencilStoreOp {
                     GPUStoreOp::Store => wgt::StoreOp::Store,
                     GPUStoreOp::Clear => wgt::StoreOp::Clear,
                 },
                 clear_stencil,
+                stencil_read_only: depth.stencilReadOnly,
             }
         });
 
diff --git a/components/script/dom/gpucomputepipeline.rs b/components/script/dom/gpucomputepipeline.rs
index a4700db4505e..e96697c95a29 100644
--- a/components/script/dom/gpucomputepipeline.rs
+++ b/components/script/dom/gpucomputepipeline.rs
@@ -20,7 +20,7 @@ pub struct GPUComputePipeline {
 }
 
 impl GPUComputePipeline {
-    fn new_inherited(compute_pipeline: WebGPUComputePipeline) -> GPUComputePipeline {
+    fn new_inherited(compute_pipeline: WebGPUComputePipeline) -> Self {
         Self {
             reflector_: Reflector::new(),
             label: DomRefCell::new(None),
@@ -28,10 +28,7 @@ impl GPUComputePipeline {
         }
     }
 
-    pub fn new(
-        global: &GlobalScope,
-        compute_pipeline: WebGPUComputePipeline,
-    ) -> DomRoot<GPUComputePipeline> {
+    pub fn new(global: &GlobalScope, compute_pipeline: WebGPUComputePipeline) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUComputePipeline::new_inherited(compute_pipeline)),
             global,
diff --git a/components/script/dom/gpudevice.rs b/components/script/dom/gpudevice.rs
index 6a4301124b9b..e8720bf2189f 100644
--- a/components/script/dom/gpudevice.rs
+++ b/components/script/dom/gpudevice.rs
@@ -85,7 +85,7 @@ impl GPUDevice {
         limits: Heap<*mut JSObject>,
         device: webgpu::WebGPUDevice,
         queue: &GPUQueue,
-    ) -> GPUDevice {
+    ) -> Self {
         Self {
             eventtarget: EventTarget::new_inherited(),
             channel,
@@ -106,7 +106,7 @@ impl GPUDevice {
         limits: Heap<*mut JSObject>,
         device: webgpu::WebGPUDevice,
         queue: webgpu::WebGPUQueue,
-    ) -> DomRoot<GPUDevice> {
+    ) -> DomRoot<Self> {
         let queue = GPUQueue::new(global, channel.clone(), queue);
         reflect_dom_object(
             Box::new(GPUDevice::new_inherited(
@@ -121,6 +121,7 @@ impl GPUDevice {
     fn validate_buffer_descriptor(
         &self,
         descriptor: &GPUBufferDescriptor,
+        mapped_at_creation: bool,
     ) -> (bool, wgt::BufferDescriptor<std::string::String>) {
         // TODO: Record a validation error in the current scope if the descriptor is invalid.
         let wgpu_usage = wgt::BufferUsage::from_bits(descriptor.usage);
@@ -132,6 +133,7 @@ impl GPUDevice {
                 wgt::BufferDescriptor {
                     size: descriptor.size,
                     usage: wgpu_usage.unwrap(),
+                    mapped_at_creation,
                     label: Default::default(),
                 },
             )
@@ -141,6 +143,7 @@ impl GPUDevice {
                 wgt::BufferDescriptor {
                     size: 0,
                     usage: wgt::BufferUsage::empty(),
+                    mapped_at_creation,
                     label: Default::default(),
                 },
             )
@@ -181,7 +184,7 @@ impl GPUDeviceMethods for GPUDevice {
 
     /// https://gpuweb.github.io/gpuweb/#dom-gpudevice-createbuffer
     fn CreateBuffer(&self, descriptor: &GPUBufferDescriptor) -> DomRoot<GPUBuffer> {
-        let (valid, wgpu_descriptor) = self.validate_buffer_descriptor(descriptor);
+        let (valid, wgpu_descriptor) = self.validate_buffer_descriptor(descriptor, false);
         let id = self
             .global()
             .wgpu_id_hub()
@@ -217,7 +220,7 @@ impl GPUDeviceMethods for GPUDevice {
         cx: SafeJSContext,
         descriptor: &GPUBufferDescriptor,
     ) -> Vec<JSVal> {
-        let (valid, wgpu_descriptor) = self.validate_buffer_descriptor(descriptor);
+        let (valid, wgpu_descriptor) = self.validate_buffer_descriptor(descriptor, true);
         let buffer_id = self
             .global()
             .wgpu_id_hub()
@@ -225,7 +228,7 @@ impl GPUDeviceMethods for GPUDevice {
             .create_buffer_id(self.device.0.backend());
         self.channel
             .0
-            .send(WebGPURequest::CreateBufferMapped {
+            .send(WebGPURequest::CreateBuffer {
                 device_id: self.device.0,
                 buffer_id,
                 descriptor: wgpu_descriptor.clone(),
@@ -546,7 +549,9 @@ impl GPUDeviceMethods for GPUDevice {
                 resource: BindingResource::Buffer(BufferBinding {
                     buffer: bind.resource.buffer.id().0,
                     offset: bind.resource.offset,
-                    size: bind.resource.size.unwrap_or(bind.resource.buffer.size()),
+                    size: wgt::BufferSize(
+                        bind.resource.size.unwrap_or(bind.resource.buffer.size()),
+                    ),
                 }),
             })
             .collect::<Vec<_>>();
@@ -729,11 +734,8 @@ impl GPUDeviceMethods for GPUDevice {
             mipmap_filter: convert_filter_mode(descriptor.mipmapFilter),
             lod_min_clamp: *descriptor.lodMinClamp,
             lod_max_clamp: *descriptor.lodMaxClamp,
-            compare: if let Some(c) = descriptor.compare {
-                convert_compare_function(c)
-            } else {
-                wgt::CompareFunction::Undefined
-            },
+            compare: descriptor.compare.map(|c| convert_compare_function(c)),
+            anisotropy_clamp: None,
         };
         self.channel
             .0
diff --git a/components/script/dom/gpupipelinelayout.rs b/components/script/dom/gpupipelinelayout.rs
index d1c3d0d2beff..af665ba8c417 100644
--- a/components/script/dom/gpupipelinelayout.rs
+++ b/components/script/dom/gpupipelinelayout.rs
@@ -26,7 +26,7 @@ impl GPUPipelineLayout {
         bind_group_layouts: Vec<WebGPUBindGroupLayout>,
         pipeline_layout: WebGPUPipelineLayout,
         valid: bool,
-    ) -> GPUPipelineLayout {
+    ) -> Self {
         Self {
             reflector_: Reflector::new(),
             bind_group_layouts,
@@ -41,7 +41,7 @@ impl GPUPipelineLayout {
         bind_group_layouts: Vec<WebGPUBindGroupLayout>,
         pipeline_layout: WebGPUPipelineLayout,
         valid: bool,
-    ) -> DomRoot<GPUPipelineLayout> {
+    ) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUPipelineLayout::new_inherited(
                 bind_group_layouts,
diff --git a/components/script/dom/gpuqueue.rs b/components/script/dom/gpuqueue.rs
index 1b4ffa590f36..5b533a8d32c4 100644
--- a/components/script/dom/gpuqueue.rs
+++ b/components/script/dom/gpuqueue.rs
@@ -23,7 +23,7 @@ pub struct GPUQueue {
 }
 
 impl GPUQueue {
-    fn new_inherited(channel: WebGPU, queue: WebGPUQueue) -> GPUQueue {
+    fn new_inherited(channel: WebGPU, queue: WebGPUQueue) -> Self {
         GPUQueue {
             channel,
             reflector_: Reflector::new(),
@@ -32,7 +32,7 @@ impl GPUQueue {
         }
     }
 
-    pub fn new(global: &GlobalScope, channel: WebGPU, queue: WebGPUQueue) -> DomRoot<GPUQueue> {
+    pub fn new(global: &GlobalScope, channel: WebGPU, queue: WebGPUQueue) -> DomRoot<Self> {
         reflect_dom_object(Box::new(GPUQueue::new_inherited(channel, queue)), global)
     }
 }
diff --git a/components/script/dom/gpurenderpassencoder.rs b/components/script/dom/gpurenderpassencoder.rs
index 47ac8c6db222..a74d1f86c8e6 100644
--- a/components/script/dom/gpurenderpassencoder.rs
+++ b/components/script/dom/gpurenderpassencoder.rs
@@ -173,12 +173,11 @@ impl GPURenderPassEncoderMethods for GPURenderPassEncoder {
 
     /// https://gpuweb.github.io/gpuweb/#dom-gpurenderencoderbase-setindexbuffer
     fn SetIndexBuffer(&self, buffer: &GPUBuffer, offset: u64, size: u64) {
-        let s;
-        if size == 0 {
-            s = buffer.size() - offset;
+        let s = if size == 0 {
+            wgt::BufferSize::WHOLE
         } else {
-            s = size;
-        }
+            wgt::BufferSize(size)
+        };
 
         if let Some(raw_pass) = self.raw_pass.borrow_mut().as_mut() {
             unsafe {
@@ -189,12 +188,11 @@ impl GPURenderPassEncoderMethods for GPURenderPassEncoder {
 
     /// https://gpuweb.github.io/gpuweb/#dom-gpurenderencoderbase-setvertexbuffer
     fn SetVertexBuffer(&self, slot: u32, buffer: &GPUBuffer, offset: u64, size: u64) {
-        let s;
-        if size == 0 {
-            s = buffer.size() - offset;
+        let s = if size == 0 {
+            wgt::BufferSize::WHOLE
         } else {
-            s = size;
-        }
+            wgt::BufferSize(size)
+        };
 
         if let Some(raw_pass) = self.raw_pass.borrow_mut().as_mut() {
             unsafe {
diff --git a/components/script/dom/gpurenderpipeline.rs b/components/script/dom/gpurenderpipeline.rs
index 68d07820103b..3a9bebba9457 100644
--- a/components/script/dom/gpurenderpipeline.rs
+++ b/components/script/dom/gpurenderpipeline.rs
@@ -27,7 +27,7 @@ impl GPURenderPipeline {
         render_pipeline: WebGPURenderPipeline,
         device: WebGPUDevice,
         valid: bool,
-    ) -> GPURenderPipeline {
+    ) -> Self {
         Self {
             reflector_: Reflector::new(),
             label: DomRefCell::new(None),
@@ -42,7 +42,7 @@ impl GPURenderPipeline {
         render_pipeline: WebGPURenderPipeline,
         device: WebGPUDevice,
         valid: bool,
-    ) -> DomRoot<GPURenderPipeline> {
+    ) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPURenderPipeline::new_inherited(
                 render_pipeline,
diff --git a/components/script/dom/gpusampler.rs b/components/script/dom/gpusampler.rs
index eab237a4c8f4..db85f60e9b6d 100644
--- a/components/script/dom/gpusampler.rs
+++ b/components/script/dom/gpusampler.rs
@@ -31,7 +31,7 @@ impl GPUSampler {
         compare_enable: bool,
         sampler: WebGPUSampler,
         valid: bool,
-    ) -> GPUSampler {
+    ) -> Self {
         Self {
             reflector_: Reflector::new(),
             channel,
@@ -50,7 +50,7 @@ impl GPUSampler {
         compare_enable: bool,
         sampler: WebGPUSampler,
         valid: bool,
-    ) -> DomRoot<GPUSampler> {
+    ) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUSampler::new_inherited(
                 channel,
diff --git a/components/script/dom/gpushadermodule.rs b/components/script/dom/gpushadermodule.rs
index 07aef69cbcc6..24a96bdaac49 100644
--- a/components/script/dom/gpushadermodule.rs
+++ b/components/script/dom/gpushadermodule.rs
@@ -19,7 +19,7 @@ pub struct GPUShaderModule {
 }
 
 impl GPUShaderModule {
-    fn new_inherited(shader_module: WebGPUShaderModule) -> GPUShaderModule {
+    fn new_inherited(shader_module: WebGPUShaderModule) -> Self {
         Self {
             reflector_: Reflector::new(),
             label: DomRefCell::new(None),
@@ -27,10 +27,7 @@ impl GPUShaderModule {
         }
     }
 
-    pub fn new(
-        global: &GlobalScope,
-        shader_module: WebGPUShaderModule,
-    ) -> DomRoot<GPUShaderModule> {
+    pub fn new(global: &GlobalScope, shader_module: WebGPUShaderModule) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUShaderModule::new_inherited(shader_module)),
             global,
diff --git a/components/script/dom/gputexture.rs b/components/script/dom/gputexture.rs
index 036c1a57307d..be2d11bfc501 100644
--- a/components/script/dom/gputexture.rs
+++ b/components/script/dom/gputexture.rs
@@ -49,7 +49,7 @@ impl GPUTexture {
         format: GPUTextureFormat,
         texture_usage: u32,
         valid: bool,
-    ) -> GPUTexture {
+    ) -> Self {
         Self {
             reflector_: Reflector::new(),
             texture,
@@ -78,7 +78,7 @@ impl GPUTexture {
         format: GPUTextureFormat,
         texture_usage: u32,
         valid: bool,
-    ) -> DomRoot<GPUTexture> {
+    ) -> DomRoot<Self> {
         reflect_dom_object(
             Box::new(GPUTexture::new_inherited(
                 texture,
diff --git a/components/script/dom/webidls/GPUAdapter.webidl b/components/script/dom/webidls/GPUAdapter.webidl
index cc664fabffa5..8d2e34f4a572 100644
--- a/components/script/dom/webidls/GPUAdapter.webidl
+++ b/components/script/dom/webidls/GPUAdapter.webidl
@@ -14,12 +14,13 @@ interface GPUAdapter {
 };
 
 dictionary GPUDeviceDescriptor : GPUObjectDescriptorBase {
-    GPUExtensions extensions = {};
+    sequence<GPUExtensionName> extensions = [];
     GPULimits limits = {};
 };
 
-dictionary GPUExtensions {
-    boolean anisotropicFiltering = false;
+enum GPUExtensionName {
+    "texture-compression-bc",
+    "pipeline-statistics-query"
 };
 
 dictionary GPULimits {
diff --git a/components/webgpu/lib.rs b/components/webgpu/lib.rs
index 442e2201e188..1248940e0795 100644
--- a/components/webgpu/lib.rs
+++ b/components/webgpu/lib.rs
@@ -74,11 +74,6 @@ pub enum WebGPURequest {
         buffer_id: id::BufferId,
         descriptor: wgt::BufferDescriptor<String>,
     },
-    CreateBufferMapped {
-        device_id: id::DeviceId,
-        buffer_id: id::BufferId,
-        descriptor: wgt::BufferDescriptor<String>,
-    },
     CreateCommandEncoder {
         device_id: id::DeviceId,
         // TODO(zakorgy): Serialize CommandEncoderDescriptor in wgpu-core
@@ -315,26 +310,9 @@ impl WGPU {
                     descriptor,
                 } => {
                     let global = &self.global;
-                    let desc = wgt::BufferDescriptor {
-                        size: descriptor.size,
-                        usage: descriptor.usage,
-                        label: ptr::null(),
-                    };
-                    let _ = gfx_select!(buffer_id => global.device_create_buffer(device_id, &desc, buffer_id));
-                },
-                WebGPURequest::CreateBufferMapped {
-                    device_id,
-                    buffer_id,
-                    descriptor,
-                } => {
-                    let global = &self.global;
-                    let desc = wgt::BufferDescriptor {
-                        size: descriptor.size,
-                        usage: descriptor.usage,
-                        label: ptr::null(),
-                    };
+                    let st = CString::new(descriptor.label.as_bytes()).unwrap();
                     let _ = gfx_select!(buffer_id =>
-                        global.device_create_buffer_mapped(device_id, &desc, buffer_id));
+                        global.device_create_buffer(device_id, &descriptor.map_label(|_| st.as_ptr()), buffer_id));
                 },
                 WebGPURequest::CreateCommandEncoder {
                     device_id,