diff --git a/moli-core/tests/scripts.rs b/moli-core/tests/scripts.rs
index 995982e3e..251d15f2e 100644
--- a/moli-core/tests/scripts.rs
+++ b/moli-core/tests/scripts.rs
@@ -1,5 +1,3 @@
-#[path = "scripts/child_script_text.rs"]
-mod child_script_text;
 #[path = "scripts/integrity.rs"]
 mod integrity;
 
diff --git a/moli-geometry/src/lib.rs b/moli-geometry/src/lib.rs
index 1fbc5b3cc..07a612141 100644
--- a/moli-geometry/src/lib.rs
+++ b/moli-geometry/src/lib.rs
@@ -38,6 +38,10 @@ mod tests {
                 matrix.dom_matrix_text().unwrap(),
                 format!("matrix(1, 0, 0, 1, 0, {expected})")
             );
+            assert_eq!(
+                matrix.dom_matrix_text_with_dimension(true).unwrap(),
+                format!("matrix(1, 0, 0, 1, 0, {expected})")
+            );
         }
     }
 
@@ -81,25 +85,6 @@ mod tests {
         );
     }
 
-    #[test]
-    fn dom_matrix_text_uses_ecmascript_number_serialization() {
-        for (value, expected) in [
-            (1.0 / 300_000_000.0, "3.3333333333333334e-9"),
-            (f64::MAX, "1.7976931348623157e+308"),
-            (f64::MIN_POSITIVE * f64::EPSILON, "5e-324"),
-        ] {
-            let matrix = DomMatrixComponents {
-                m42: value,
-                ..DomMatrixComponents::identity()
-            };
-
-            assert_eq!(
-                matrix.dom_matrix_text_with_dimension(true).unwrap(),
-                format!("matrix(1, 0, 0, 1, 0, {expected})")
-            );
-        }
-    }
-
     #[test]
     fn inverse_handles_invertible_3d_matrix() {
         let matrix = DomMatrixComponents::identity()
diff --git a/moli-renderer-v8/src/blob.rs b/moli-renderer-v8/src/blob.rs
index f32c29e15..dd36025ce 100644
--- a/moli-renderer-v8/src/blob.rs
+++ b/moli-renderer-v8/src/blob.rs
@@ -1,4 +1,4 @@
-use crate::web_api_interfaces;
+use crate::{native_bridge, web_api_interfaces};
 use moli_file_api::{
     BlobId, BlobLineEndings, BlobStore, blob_slice_relative_index, clamp_blob_long_long,
     normalize_blob_line_endings_with_native_ending, normalize_blob_mime_type,
diff --git a/moli-renderer-v8/src/context_bootstrap.rs b/moli-renderer-v8/src/context_bootstrap.rs
index 5358117f3..b19fca88c 100644
--- a/moli-renderer-v8/src/context_bootstrap.rs
+++ b/moli-renderer-v8/src/context_bootstrap.rs
@@ -240,7 +240,7 @@ pub(crate) use self::css_stylesheet_runtime::{
     sync_css_style_sheet_shadow_root_adopted_owner_tracking,
 };
 pub(crate) use self::dom_rect::build_dom_rect_object;
-pub(crate) use self::dom_rect_list::{build_dom_rect_list_object};
+pub(crate) use self::dom_rect_list::build_dom_rect_list_object;
 pub(crate) use self::events::{
     EVENT_DISPATCHING_SLOT, EVENT_PASSIVE_SLOT, EVENT_STOP_IMMEDIATE_PROPAGATION_SLOT,
     EVENT_STOP_PROPAGATION_SLOT, EventHandlerType, apply_before_unload_event_handler_return_value,
@@ -436,8 +436,7 @@ pub(crate) use self::streams::{
     initialize_transform_stream_clone_shell, initialize_writable_stream_clone_shell,
     new_readable_stream_from_array_buffer, new_readable_stream_from_source,
     prepare_readable_stream_transfer, prepare_transform_stream_transfer,
-    prepare_writable_stream_transfer,
-    proxy_fetch_body_stream, tee_fetch_body_stream,
+    prepare_writable_stream_transfer, proxy_fetch_body_stream, tee_fetch_body_stream,
 };
 #[cfg(test)]
 pub(crate) use self::trusted_types::trusted_types_lazy_state_materialized;
diff --git a/moli-renderer-v8/src/context_bootstrap/bridge_descriptor/descriptors.rs b/moli-renderer-v8/src/context_bootstrap/bridge_descriptor/descriptors.rs
index 5e1a60d71..8a15403ce 100644
--- a/moli-renderer-v8/src/context_bootstrap/bridge_descriptor/descriptors.rs
+++ b/moli-renderer-v8/src/context_bootstrap/bridge_descriptor/descriptors.rs
@@ -109,14 +109,20 @@ const NODE_BRIDGE_DESCRIPTORS: &[BridgeDescriptor] = &[
         ELEMENT_GROUPS,
     ),
     descriptor(web_api_interfaces::SVGAElement::DESCRIPTOR, ELEMENT_GROUPS),
-    descriptor(web_api_interfaces::SVGClipPathElement::DESCRIPTOR, ELEMENT_GROUPS),
+    descriptor(
+        web_api_interfaces::SVGClipPathElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
     specialized_descriptor(
         web_api_interfaces::SVGCircleElement::DESCRIPTOR,
         ELEMENT_GROUPS,
         SpecializedTemplateInstaller::None,
         SVG_GEOMETRY_RUNTIME_INSTALL_GROUPS,
     ),
-    descriptor(web_api_interfaces::SVGFilterElement::DESCRIPTOR, ELEMENT_GROUPS),
+    descriptor(
+        web_api_interfaces::SVGFilterElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
     descriptor(
         web_api_interfaces::SVGDefsElement::DESCRIPTOR,
         ELEMENT_GROUPS,
@@ -151,12 +157,18 @@ const NODE_BRIDGE_DESCRIPTORS: &[BridgeDescriptor] = &[
         web_api_interfaces::SVGFEFuncRElement::DESCRIPTOR,
         ELEMENT_GROUPS,
     ),
-    descriptor(web_api_interfaces::SVGFEBlendElement::DESCRIPTOR, ELEMENT_GROUPS),
+    descriptor(
+        web_api_interfaces::SVGFEBlendElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
     descriptor(
         web_api_interfaces::SVGFEColorMatrixElement::DESCRIPTOR,
         ELEMENT_GROUPS,
     ),
-    descriptor(web_api_interfaces::SVGFECompositeElement::DESCRIPTOR, ELEMENT_GROUPS),
+    descriptor(
+        web_api_interfaces::SVGFECompositeElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
     descriptor(
         web_api_interfaces::SVGFEConvolveMatrixElement::DESCRIPTOR,
         ELEMENT_GROUPS,
@@ -173,20 +185,38 @@ const NODE_BRIDGE_DESCRIPTORS: &[BridgeDescriptor] = &[
         web_api_interfaces::SVGFEDistantLightElement::DESCRIPTOR,
         ELEMENT_GROUPS,
     ),
-    descriptor(web_api_interfaces::SVGFEDropShadowElement::DESCRIPTOR, ELEMENT_GROUPS),
+    descriptor(
+        web_api_interfaces::SVGFEDropShadowElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
     descriptor(
         web_api_interfaces::SVGFEGaussianBlurElement::DESCRIPTOR,
         ELEMENT_GROUPS,
     ),
-    descriptor(web_api_interfaces::SVGFEMorphologyElement::DESCRIPTOR, ELEMENT_GROUPS),
-    descriptor(web_api_interfaces::SVGFEOffsetElement::DESCRIPTOR, ELEMENT_GROUPS),
-    descriptor(web_api_interfaces::SVGFEPointLightElement::DESCRIPTOR, ELEMENT_GROUPS),
+    descriptor(
+        web_api_interfaces::SVGFEMorphologyElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
+    descriptor(
+        web_api_interfaces::SVGFEOffsetElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
+    descriptor(
+        web_api_interfaces::SVGFEPointLightElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
     descriptor(
         web_api_interfaces::SVGFESpecularLightingElement::DESCRIPTOR,
         ELEMENT_GROUPS,
     ),
-    descriptor(web_api_interfaces::SVGFESpotLightElement::DESCRIPTOR, ELEMENT_GROUPS),
-    descriptor(web_api_interfaces::SVGFETurbulenceElement::DESCRIPTOR, ELEMENT_GROUPS),
+    descriptor(
+        web_api_interfaces::SVGFESpotLightElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
+    descriptor(
+        web_api_interfaces::SVGFETurbulenceElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
     descriptor(
         web_api_interfaces::SVGForeignObjectElement::DESCRIPTOR,
         ELEMENT_GROUPS,
@@ -218,12 +248,30 @@ const NODE_BRIDGE_DESCRIPTORS: &[BridgeDescriptor] = &[
             svg_gradient_transform: true,
         },
     ),
-    descriptor(web_api_interfaces::SVGMarkerElement::DESCRIPTOR, ELEMENT_GROUPS),
-    descriptor(web_api_interfaces::SVGMaskElement::DESCRIPTOR, ELEMENT_GROUPS),
-    descriptor(web_api_interfaces::SVGMetadataElement::DESCRIPTOR, ELEMENT_GROUPS),
-    descriptor(web_api_interfaces::SVGScriptElement::DESCRIPTOR, ELEMENT_GROUPS),
-    descriptor(web_api_interfaces::SVGStopElement::DESCRIPTOR, ELEMENT_GROUPS),
-    descriptor(web_api_interfaces::SVGStyleElement::DESCRIPTOR, ELEMENT_GROUPS),
+    descriptor(
+        web_api_interfaces::SVGMarkerElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
+    descriptor(
+        web_api_interfaces::SVGMaskElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
+    descriptor(
+        web_api_interfaces::SVGMetadataElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
+    descriptor(
+        web_api_interfaces::SVGScriptElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
+    descriptor(
+        web_api_interfaces::SVGStopElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
+    descriptor(
+        web_api_interfaces::SVGStyleElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
     specialized_descriptor(
         web_api_interfaces::SVGPathElement::DESCRIPTOR,
         ELEMENT_GROUPS,
@@ -318,7 +366,10 @@ const NODE_BRIDGE_DESCRIPTORS: &[BridgeDescriptor] = &[
         web_api_interfaces::SVGUseElement::DESCRIPTOR,
         ELEMENT_GROUPS,
     ),
-    descriptor(web_api_interfaces::SVGViewElement::DESCRIPTOR, ELEMENT_GROUPS),
+    descriptor(
+        web_api_interfaces::SVGViewElement::DESCRIPTOR,
+        ELEMENT_GROUPS,
+    ),
     specialized_descriptor(
         web_api_interfaces::SVGRectElement::DESCRIPTOR,
         ELEMENT_GROUPS,
diff --git a/moli-renderer-v8/src/context_bootstrap/canvas/image_bitmap.rs b/moli-renderer-v8/src/context_bootstrap/canvas/image_bitmap.rs
index fb3093189..dce989be7 100644
--- a/moli-renderer-v8/src/context_bootstrap/canvas/image_bitmap.rs
+++ b/moli-renderer-v8/src/context_bootstrap/canvas/image_bitmap.rs
@@ -188,7 +188,7 @@ impl<'s> webidl::WebIdlConverter<'s> for BitmapSource<'s> {
         } else if offscreen_canvas_receiver_branded(scope, object) || is_html_canvas(scope, object)
         {
             BitmapSourceKind::Canvas
-        } else if crate::context_bootstrap::image_data::is_image_data_object(scope, object) {
+        } else if web_api_interfaces::ImageData::is_instance(scope, object) {
             BitmapSourceKind::ImageData
         } else if image_bitmap_receiver_branded(scope, object) {
             BitmapSourceKind::ImageBitmap
diff --git a/moli-renderer-v8/src/context_bootstrap/file_api/file_list.rs b/moli-renderer-v8/src/context_bootstrap/file_api/file_list.rs
index 4fb57da03..a101928ca 100644
--- a/moli-renderer-v8/src/context_bootstrap/file_api/file_list.rs
+++ b/moli-renderer-v8/src/context_bootstrap/file_api/file_list.rs
@@ -10,7 +10,6 @@ const FILE_LIST_FILES_SLOT: &str = "__lmFileListFiles";
 #[derive(WebApiObject)]
 #[webapi(interface = web_api_interfaces::FileList, require_prototype)]
 struct FileListObjectDeclaration {
-
     #[webapi(slot = FILE_LIST_LENGTH_SLOT)]
     length: f64,
 }
diff --git a/moli-renderer-v8/src/context_bootstrap/indexed_db/core/clone.rs b/moli-renderer-v8/src/context_bootstrap/indexed_db/core/clone.rs
index fd14723bf..be6c1a1d3 100644
--- a/moli-renderer-v8/src/context_bootstrap/indexed_db/core/clone.rs
+++ b/moli-renderer-v8/src/context_bootstrap/indexed_db/core/clone.rs
@@ -110,7 +110,10 @@ impl v8::ValueSerializerImpl for IndexedDbStructuredCloneSerializer {
                     return Some(true);
                 }
             }
-            Some("DOMPoint" | "DOMPointReadOnly" | "DOMRect" | "DOMRectReadOnly" | "DOMQuad" | "DOMMatrix" | "DOMMatrixReadOnly") => {
+            Some(
+                "DOMPoint" | "DOMPointReadOnly" | "DOMRect" | "DOMRectReadOnly" | "DOMQuad"
+                | "DOMMatrix" | "DOMMatrixReadOnly",
+            ) => {
                 if let Some(payload) = geometry_clone_payload_from_object(scope, object) {
                     write_geometry_clone_payload(serializer, payload);
                     return Some(true);
diff --git a/moli-renderer-v8/src/context_bootstrap/performance_runtime.rs b/moli-renderer-v8/src/context_bootstrap/performance_runtime.rs
index a51468330..8c8237874 100644
--- a/moli-renderer-v8/src/context_bootstrap/performance_runtime.rs
+++ b/moli-renderer-v8/src/context_bootstrap/performance_runtime.rs
@@ -102,7 +102,6 @@ pub(super) use super::performance_observer_runtime::{
     performance_observer_disconnect_callback, performance_observer_observe_callback,
     performance_observer_take_records_callback,
 };
-pub(crate) use entries::is_performance_entry_object;
 use entries::{
     append_performance_entry, create_performance_entry, initialize_resource_timing_slots,
     push_performance_entry,
diff --git a/moli-renderer-v8/src/context_bootstrap/performance_runtime/install.rs b/moli-renderer-v8/src/context_bootstrap/performance_runtime/install.rs
index a33ac1088..21628dcc1 100644
--- a/moli-renderer-v8/src/context_bootstrap/performance_runtime/install.rs
+++ b/moli-renderer-v8/src/context_bootstrap/performance_runtime/install.rs
@@ -1129,13 +1129,6 @@ fn apply_lifecycle_to_navigation_entry<'s>(
     }
 }
 
-pub(super) fn is_window_performance<'s>(
-    scope: &mut v8::PinScope<'s, '_>,
-    performance: v8::Local<'s, v8::Object>,
-) -> bool {
-    get_private_value(scope, performance, PERFORMANCE_NAVIGATION_TYPE_SEED_SLOT).is_some()
-}
-
 pub(super) fn performance_navigation_type_seed<'s>(
     scope: &mut v8::PinScope<'s, '_>,
     performance: v8::Local<'s, v8::Object>,
diff --git a/moli-renderer-v8/src/context_bootstrap/performance_runtime/marks_measures.rs b/moli-renderer-v8/src/context_bootstrap/performance_runtime/marks_measures.rs
index d5ee0b959..99bb56124 100644
--- a/moli-renderer-v8/src/context_bootstrap/performance_runtime/marks_measures.rs
+++ b/moli-renderer-v8/src/context_bootstrap/performance_runtime/marks_measures.rs
@@ -30,22 +30,6 @@ struct PerformanceMarkOptions<'s> {
     start_time: Option<f64>,
 }
 
-#[derive(webidl::WebIdlArgs)]
-#[webidl(prefix = "PerformanceMark")]
-struct PerformanceMarkConstructorArgs {
-    #[webidl(required)]
-    name: String,
-}
-
-#[derive(Default, webidl::WebIdlDictionary)]
-#[webidl(prefix = "PerformanceMarkOptions")]
-struct PerformanceMarkOptions<'s> {
-    #[webidl(converter = "raw")]
-    detail: Option<v8::Local<'s, v8::Value>>,
-    #[webidl(name = "startTime", converter = "double")]
-    start_time: Option<f64>,
-}
-
 #[derive(webidl::WebIdlArgs)]
 #[webidl(prefix = "Performance.clearMarks")]
 struct PerformanceClearMarksArgs {
diff --git a/moli-renderer-v8/src/context_bootstrap/streams.rs b/moli-renderer-v8/src/context_bootstrap/streams.rs
index 730358429..6e55189ad 100644
--- a/moli-renderer-v8/src/context_bootstrap/streams.rs
+++ b/moli-renderer-v8/src/context_bootstrap/streams.rs
@@ -9,9 +9,9 @@ use super::stream_adapter::{
     parse_writable_stream_sink_object, readable_stream_byob_request_respond_callback,
     readable_stream_byob_request_respond_with_new_view_callback,
     readable_stream_byob_request_view_getter, readable_stream_is_byte_stream,
-    readable_stream_locked, rejected_promise_value, set_resolved_promise, stream_slot_array,
-    stream_slot_object, suppress_promise_unhandled_rejection, writable_stream_close_internal,
-    writable_stream_locked, writable_stream_snapshot,
+    readable_stream_locked, rejected_promise_value, set_resolved_promise, stream_slot_object,
+    suppress_promise_unhandled_rejection, writable_stream_close_internal, writable_stream_locked,
+    writable_stream_snapshot,
 };
 use super::stream_objects::{
     new_readable_stream_byob_reader_object, new_readable_stream_reader_object,
diff --git a/moli-renderer-v8/src/context_bootstrap/streams/from.rs b/moli-renderer-v8/src/context_bootstrap/streams/from.rs
index 1990ec63e..97f863ade 100644
--- a/moli-renderer-v8/src/context_bootstrap/streams/from.rs
+++ b/moli-renderer-v8/src/context_bootstrap/streams/from.rs
@@ -9,7 +9,7 @@ const READABLE_STREAM_FROM_REACTION_STREAM_SLOT: &str = "__moliReadableStreamFro
 const READABLE_STREAM_FROM_REACTION_SYNC_SLOT: &str = "__moliReadableStreamFromReactionSync";
 
 #[derive(WebApiObject)]
-#[webapi(interface = "Object")]
+#[webapi(plain)]
 struct ReadableStreamFromSourceDeclaration<'scope> {
     #[webapi(slot = READABLE_STREAM_FROM_ITERATOR_SLOT)]
     iterator: v8::Local<'scope, v8::Object>,
@@ -24,7 +24,7 @@ struct ReadableStreamFromSourceDeclaration<'scope> {
 }
 
 #[derive(WebApiObject)]
-#[webapi(interface = "Object")]
+#[webapi(plain)]
 struct ReadableStreamFromReactionDeclaration<'scope> {
     #[webapi(slot = READABLE_STREAM_FROM_REACTION_STREAM_SLOT)]
     stream: v8::Local<'scope, v8::Object>,
diff --git a/moli-renderer-v8/src/context_bootstrap/svg_runtime/callbacks.rs b/moli-renderer-v8/src/context_bootstrap/svg_runtime/callbacks.rs
index fb2a78a55..528c5e673 100644
--- a/moli-renderer-v8/src/context_bootstrap/svg_runtime/callbacks.rs
+++ b/moli-renderer-v8/src/context_bootstrap/svg_runtime/callbacks.rs
@@ -713,13 +713,7 @@ pub(super) fn svg_marker_set_orient_to_angle_callback<'s>(
         );
         return;
     };
-    if !require_svg_receiver(
-        scope,
-        angle,
-        SVG_ANGLE_UNIT_TYPE_SLOT,
-        "SVGAngle",
-        "setOrientToAngle argument",
-    ) {
+    if !require_svg_receiver(scope, angle, "SVGAngle", "setOrientToAngle argument") {
         return;
     }
     sync_svg_angle_from_owner_attribute(scope, angle);
@@ -810,7 +804,7 @@ fn require_svg_interface_receiver<'s>(
         }
         let Some(parent) =
             crate::context_bootstrap::bridge_descriptor::node_bridge_descriptor(interface_name)
-                .and_then(|descriptor| descriptor.parent_constructor)
+                .and_then(|descriptor| descriptor.interface.parent_name())
         else {
             break;
         };
@@ -1103,7 +1097,6 @@ pub(super) fn svg_animated_string_getter<'s>(
     if !require_svg_receiver(
         scope,
         args.this(),
-        SVG_ANIMATED_STRING_BASE_VAL_SLOT,
         "SVGAnimatedString",
         &format!("{name} getter"),
     ) {
@@ -1141,7 +1134,6 @@ pub(super) fn svg_animated_boolean_getter<'s>(
     if !require_svg_receiver(
         scope,
         args.this(),
-        SVG_ANIMATED_BOOLEAN_BASE_VAL_SLOT,
         "SVGAnimatedBoolean",
         &format!("{name} getter"),
     ) {
@@ -1176,7 +1168,6 @@ pub(super) fn svg_animated_boolean_setter<'s>(
     if !require_svg_receiver(
         scope,
         args.this(),
-        SVG_ANIMATED_BOOLEAN_BASE_VAL_SLOT,
         "SVGAnimatedBoolean",
         &format!("{name} setter"),
     ) || name != "baseVal"
@@ -1203,13 +1194,7 @@ pub(super) fn svg_animated_string_setter<'s>(
     args: v8::FunctionCallbackArguments<'s>,
     _rv: v8::ReturnValue<'_, v8::Value>,
 ) {
-    if !require_svg_receiver(
-        scope,
-        args.this(),
-        SVG_ANIMATED_STRING_BASE_VAL_SLOT,
-        "SVGAnimatedString",
-        "baseVal setter",
-    ) {
+    if !require_svg_receiver(scope, args.this(), "SVGAnimatedString", "baseVal setter") {
         return;
     }
     let animated = args.this();
@@ -1289,7 +1274,6 @@ pub(super) fn svg_animated_angle_getter<'s>(
     if !require_svg_receiver(
         scope,
         args.this(),
-        SVG_ANIMATED_ANGLE_BASE_VAL_SLOT,
         "SVGAnimatedAngle",
         &format!("{name} getter"),
     ) {
@@ -1325,7 +1309,6 @@ pub(super) fn svg_animated_rect_getter<'s>(
     if !require_svg_receiver(
         scope,
         args.this(),
-        SVG_ANIMATED_RECT_BASE_VAL_SLOT,
         "SVGAnimatedRect",
         &format!("{name} getter"),
     ) {
@@ -1361,7 +1344,6 @@ pub(super) fn svg_animated_preserve_aspect_ratio_getter<'s>(
     if !require_svg_receiver(
         scope,
         args.this(),
-        SVG_ANIMATED_PRESERVE_ASPECT_RATIO_BASE_VAL_SLOT,
         "SVGAnimatedPreserveAspectRatio",
         &format!("{name} getter"),
     ) {
@@ -1398,7 +1380,6 @@ pub(super) fn svg_preserve_aspect_ratio_getter<'s>(
     if !require_svg_receiver(
         scope,
         aspect_ratio,
-        SVG_PRESERVE_ASPECT_RATIO_ALIGN_SLOT,
         "SVGPreserveAspectRatio",
         &format!("{name} getter"),
     ) {
@@ -1440,7 +1421,6 @@ pub(super) fn svg_preserve_aspect_ratio_setter<'s>(
     if !require_svg_receiver(
         scope,
         aspect_ratio,
-        SVG_PRESERVE_ASPECT_RATIO_ALIGN_SLOT,
         "SVGPreserveAspectRatio",
         &format!("{name} setter"),
     ) {
@@ -1589,13 +1569,7 @@ pub(super) fn svg_angle_getter<'s>(
         rv.set_undefined();
         return;
     };
-    if !require_svg_receiver(
-        scope,
-        args.this(),
-        SVG_ANGLE_UNIT_TYPE_SLOT,
-        "SVGAngle",
-        &format!("{name} getter"),
-    ) {
+    if !require_svg_receiver(scope, args.this(), "SVGAngle", &format!("{name} getter")) {
         return;
     }
     sync_svg_angle_from_owner_attribute(scope, args.this());
@@ -1637,13 +1611,7 @@ pub(super) fn svg_angle_setter<'s>(
     ) else {
         return;
     };
-    if !require_svg_receiver(
-        scope,
-        args.this(),
-        SVG_ANGLE_UNIT_TYPE_SLOT,
-        "SVGAngle",
-        &format!("{name} setter"),
-    ) {
+    if !require_svg_receiver(scope, args.this(), "SVGAngle", &format!("{name} setter")) {
         return;
     }
     if svg_angle_is_read_only(scope, args.this()) {
@@ -1854,7 +1822,6 @@ pub(super) fn svg_animated_integer_getter<'s>(
     if !require_svg_receiver(
         scope,
         args.this(),
-        SVG_ANIMATED_INTEGER_BASE_VAL_SLOT,
         "SVGAnimatedInteger",
         &format!("{name} getter"),
     ) {
@@ -2053,7 +2020,6 @@ pub(super) fn svg_animated_integer_setter<'s>(
     if !require_svg_receiver(
         scope,
         args.this(),
-        SVG_ANIMATED_INTEGER_BASE_VAL_SLOT,
         "SVGAnimatedInteger",
         &format!("{name} setter"),
     ) || name != "baseVal"
@@ -3727,13 +3693,7 @@ pub(super) fn svg_length_new_value_specified_units_callback<'s>(
     args: v8::FunctionCallbackArguments<'s>,
     mut rv: v8::ReturnValue<'_, v8::Value>,
 ) {
-    if !require_svg_receiver(
-        scope,
-        args.this(),
-        SVG_LENGTH_UNIT_TYPE_SLOT,
-        "SVGLength",
-        "newValueSpecifiedUnits",
-    ) {
+    if !require_svg_receiver(scope, args.this(), "SVGLength", "newValueSpecifiedUnits") {
         return;
     }
     let Some(parsed) = webidl::parse_args::<SvgLengthNewValueSpecifiedUnitsArgs>(scope, &args)
@@ -3760,13 +3720,7 @@ pub(super) fn svg_angle_new_value_specified_units_callback<'s>(
     args: v8::FunctionCallbackArguments<'s>,
     mut rv: v8::ReturnValue<'_, v8::Value>,
 ) {
-    if !require_svg_receiver(
-        scope,
-        args.this(),
-        SVG_ANGLE_UNIT_TYPE_SLOT,
-        "SVGAngle",
-        "newValueSpecifiedUnits",
-    ) {
+    if !require_svg_receiver(scope, args.this(), "SVGAngle", "newValueSpecifiedUnits") {
         return;
     }
     if svg_angle_is_read_only(scope, args.this()) {
@@ -3800,13 +3754,7 @@ pub(super) fn svg_length_convert_to_specified_units_callback<'s>(
     args: v8::FunctionCallbackArguments<'s>,
     mut rv: v8::ReturnValue<'_, v8::Value>,
 ) {
-    if !require_svg_receiver(
-        scope,
-        args.this(),
-        SVG_LENGTH_UNIT_TYPE_SLOT,
-        "SVGLength",
-        "convertToSpecifiedUnits",
-    ) {
+    if !require_svg_receiver(scope, args.this(), "SVGLength", "convertToSpecifiedUnits") {
         return;
     }
     let Some(parsed) = webidl::parse_args::<SvgLengthConvertToSpecifiedUnitsArgs>(scope, &args)
@@ -3845,13 +3793,7 @@ pub(super) fn svg_angle_convert_to_specified_units_callback<'s>(
     args: v8::FunctionCallbackArguments<'s>,
     mut rv: v8::ReturnValue<'_, v8::Value>,
 ) {
-    if !require_svg_receiver(
-        scope,
-        args.this(),
-        SVG_ANGLE_UNIT_TYPE_SLOT,
-        "SVGAngle",
-        "convertToSpecifiedUnits",
-    ) {
+    if !require_svg_receiver(scope, args.this(), "SVGAngle", "convertToSpecifiedUnits") {
         return;
     }
     if svg_angle_is_read_only(scope, args.this()) {
diff --git a/moli-renderer-v8/src/context_bootstrap/trusted_types.rs b/moli-renderer-v8/src/context_bootstrap/trusted_types.rs
index 97044ee8f..1ac4abfdc 100644
--- a/moli-renderer-v8/src/context_bootstrap/trusted_types.rs
+++ b/moli-renderer-v8/src/context_bootstrap/trusted_types.rs
@@ -846,7 +846,9 @@ fn build_trusted_script_code_like_carrier<'s>(
     TrustedTypeObjectDeclaration::new(value)
         .initialize(scope, object)
         .expect("TrustedScript code-like carrier declaration should initialize");
-    web_api_interfaces::TrustedScript::DESCRIPTOR.initialize(scope, object).ok()?;
+    web_api_interfaces::TrustedScript::DESCRIPTOR
+        .initialize(scope, object)
+        .ok()?;
     Some(object)
 }
 
@@ -871,9 +873,8 @@ fn trusted_type_to_string_callback<'s>(
     mut rv: v8::ReturnValue<'_, v8::Value>,
 ) {
     let this = args.this();
-    if !trusted_type_kind(scope, this.into()).is_some_and(|kind| {
-        v8str(scope, kind.constructor_name()).strict_equals(args.data())
-    })
+    if !trusted_type_kind(scope, this.into())
+        .is_some_and(|kind| v8str(scope, kind.constructor_name()).strict_equals(args.data()))
     {
         throw_type_error(scope, "Illegal invocation");
         return;
diff --git a/moli-renderer-v8/src/context_bootstrap/webrtc/events.rs b/moli-renderer-v8/src/context_bootstrap/webrtc/events.rs
index c239d7fcb..23b2d54df 100644
--- a/moli-renderer-v8/src/context_bootstrap/webrtc/events.rs
+++ b/moli-renderer-v8/src/context_bootstrap/webrtc/events.rs
@@ -1,5 +1,5 @@
-use crate::web_api_interfaces;
 use super::{ice_candidate::ice_candidate_receiver_branded, rtc_data_channel_receiver_branded};
+use crate::web_api_interfaces;
 use crate::{
     context_bootstrap::events::{initialize_event_object_with_type, parse_event_init},
     util::{
diff --git a/moli-renderer-v8/src/context_bootstrap/window_template.rs b/moli-renderer-v8/src/context_bootstrap/window_template.rs
index 06dd8a25a..4042c86f8 100644
--- a/moli-renderer-v8/src/context_bootstrap/window_template.rs
+++ b/moli-renderer-v8/src/context_bootstrap/window_template.rs
@@ -28,7 +28,7 @@ use moli_webapi_declare::{WebApiFunctionTemplate, WebApiObject};
 const WINDOW_NAMED_PROPERTIES_REFLECT_SET_SLOT: &str = "__moliWindowNamedPropertiesReflectSet";
 
 #[derive(WebApiObject)]
-#[webapi(interface = "Object")]
+#[webapi(plain)]
 struct WindowNamedPropertiesProxyHandlerDeclaration {
     #[webapi(method, length = 4, callback = window_named_properties_proxy_set_callback)]
     set: (),
diff --git a/moli-renderer-v8/src/native_bridge/bindings/node_template.rs b/moli-renderer-v8/src/native_bridge/bindings/node_template.rs
index aba009c4b..753d0efce 100644
--- a/moli-renderer-v8/src/native_bridge/bindings/node_template.rs
+++ b/moli-renderer-v8/src/native_bridge/bindings/node_template.rs
@@ -18,7 +18,7 @@ pub(super) fn build_node_wrapper_template<'s, 'i>(
     let template = v8::ObjectTemplate::new(scope);
     let _ = template.set_internal_field_count(1);
 
-    if descriptor.prototype_name == "HTMLDocument" {
+    if descriptor.interface.name() == "HTMLDocument" {
         named_access::install_document_named_property_handler(template);
     }
 
diff --git a/moli-renderer-v8/src/native_bridge/element/global_attributes.rs b/moli-renderer-v8/src/native_bridge/element/global_attributes.rs
index 57ad7666c..7361f1524 100644
--- a/moli-renderer-v8/src/native_bridge/element/global_attributes.rs
+++ b/moli-renderer-v8/src/native_bridge/element/global_attributes.rs
@@ -1,6 +1,5 @@
 use crate::document_runtime::DomHandle;
 use crate::dom::{forms::InputType, native::Node};
-use crate::native_bridge::document::XHTML_NS;
 use crate::util::v8_string;
 use crate::webidl;
 
diff --git a/moli-renderer-v8/src/network_host/body_source/stream_consumer.rs b/moli-renderer-v8/src/network_host/body_source/stream_consumer.rs
index e66df663c..20fb56d4d 100644
--- a/moli-renderer-v8/src/network_host/body_source/stream_consumer.rs
+++ b/moli-renderer-v8/src/network_host/body_source/stream_consumer.rs
@@ -25,7 +25,7 @@ const SUCCEEDED: &str = "__moliBodyConsumerSucceeded";
 const REASON: &str = "__moliBodyConsumerReason";
 
 #[derive(WebApiObject)]
-#[webapi(interface = "Object")]
+#[webapi(plain)]
 struct BodyConsumerDeclaration<'scope> {
     #[webapi(slot = BODY_OWNER)]
     body_owner: v8::Local<'scope, v8::Object>,
diff --git a/moli-renderer-v8/src/network_host/request/init.rs b/moli-renderer-v8/src/network_host/request/init.rs
index 2eb13ab4e..e580b6b2a 100644
--- a/moli-renderer-v8/src/network_host/request/init.rs
+++ b/moli-renderer-v8/src/network_host/request/init.rs
@@ -243,7 +243,7 @@ pub(crate) fn parse_fetch_init<'s>(
     .map_err(|error| error.to_string())?;
     let body_stream = body_value
         .and_then(|value| v8::Local::<v8::Object>::try_from(value).ok())
-        .filter(|object| crate::context_bootstrap::is_readable_stream_object(scope, *object))
+        .filter(|object| crate::web_api_interfaces::ReadableStream::is_instance(scope, *object))
         .map(|stream| v8::Global::new(scope, stream));
     let prepared_body = body_value
         .map(|value| body_init(scope, value, webidl::Context::member("RequestInit", "body")))
diff --git a/moli-renderer-v8/src/network_host/request/input.rs b/moli-renderer-v8/src/network_host/request/input.rs
index e2c8f3814..9fbb9de82 100644
--- a/moli-renderer-v8/src/network_host/request/input.rs
+++ b/moli-renderer-v8/src/network_host/request/input.rs
@@ -1,6 +1,5 @@
 use super::super::headers::HeadersGuard;
 use super::*;
-use crate::web_api_interfaces;
 use crate::webidl;
 
 pub(super) fn normalize_fetch_request_method(method: &str) -> Result<String, &'static str> {
diff --git a/moli-renderer-v8/src/network_host/response/materialize.rs b/moli-renderer-v8/src/network_host/response/materialize.rs
index 5809b75c3..ef2586b9f 100644
--- a/moli-renderer-v8/src/network_host/response/materialize.rs
+++ b/moli-renderer-v8/src/network_host/response/materialize.rs
@@ -5,7 +5,6 @@ use super::super::fetch_surface::{
 };
 use super::*;
 use crate::types::NetworkBodySourceId;
-use crate::web_api_interfaces;
 use moli_fetch::RequestMode;
 use moli_url::WebOrigin;
 use moli_webapi_declare::WebApiObject;
diff --git a/moli-renderer-v8/src/script_vm/tests/browser_api/trusted_types.rs b/moli-renderer-v8/src/script_vm/tests/browser_api/trusted_types.rs
index 369020f58..b9fa7ef99 100644
--- a/moli-renderer-v8/src/script_vm/tests/browser_api/trusted_types.rs
+++ b/moli-renderer-v8/src/script_vm/tests/browser_api/trusted_types.rs
@@ -2964,84 +2964,3 @@ fn service_worker_register_gates_script_url_before_url_resolution() {
         r#"{"blockedString":"TypeError","blockedWrongType":"TypeError","missing":"TypeError","trustedPromise":true,"defaultPromise":true,"defaultCalls":[["worker.potato","TrustedScriptURL","ServiceWorkerContainer register"]]}"#
     );
 }
-
-#[test]
-fn dom_parser_gates_converted_union_source_after_webidl_argument_conversion() {
-    let mut vm = new_storage_test_vm("https://dom-parser-trusted-types.test/");
-    vm.set_response_content_security_policies(&["require-trusted-types-for 'script'".to_owned()]);
-
-    let result = vm
-        .eval(
-            r#"
-(() => {
-  const errorName = callback => {
-    try {
-      callback();
-      return "none";
-    } catch (error) {
-      return error && error.name;
-    }
-  };
-  const parser = new DOMParser();
-  const custom = trustedTypes.createPolicy("dom-parser-custom", {
-    createHTML: value => value
-  });
-  const blocked = [
-    errorName(() => parser.parseFromString("<p>blocked</p>", "text/html")),
-    errorName(() => parser.parseFromString(null, "text/html")),
-    errorName(() => parser.parseFromString("<root/>", "application/xml"))
-  ];
-  const accepted = [
-    parser.parseFromString(
-      custom.createHTML("<main>trusted</main>"),
-      "text/html"
-    ).body.innerText,
-    parser.parseFromString(
-      custom.createHTML("<root/>"),
-      "application/xml"
-    ).documentElement.tagName
-  ];
-
-  let sourceConversions = 0;
-  const defaultCalls = [];
-  trustedTypes.createPolicy("default", {
-    createHTML: (value, type, sink) => {
-      defaultCalls.push([value, type, sink]);
-      return value === "source" ? "<p>default</p>" : value;
-    }
-  });
-  const source = {
-    toString() {
-      sourceConversions += 1;
-      return "source";
-    }
-  };
-  const defaultValues = [
-    parser.parseFromString(source, "text/html").body.innerText,
-    parser.parseFromString(null, "text/html").body.innerText,
-    parser.parseFromString("<root/>", "application/xml").documentElement.tagName
-  ];
-  const callsBeforeInvalidType = defaultCalls.length;
-  const invalidType = errorName(() => parser.parseFromString(source, "TEXT/html"));
-  const invalidTypeSkippedPolicy = defaultCalls.length === callsBeforeInvalidType;
-
-  return JSON.stringify({
-    blocked,
-    accepted,
-    defaultValues,
-    sourceConversions,
-    invalidType,
-    invalidTypeSkippedPolicy,
-    symbolSource: errorName(() => parser.parseFromString(Symbol(), "text/html")),
-    defaultCalls
-  });
-})()
-"#,
-        )
-        .expect("DOMParser TrustedHTML union probe should evaluate");
-
-    assert_eq!(
-        result,
-        r#"{"blocked":["TypeError","TypeError","TypeError"],"accepted":["trusted","root"],"defaultValues":["default","null","root"],"sourceConversions":2,"invalidType":"TypeError","invalidTypeSkippedPolicy":true,"symbolSource":"TypeError","defaultCalls":[["source","TrustedHTML","DOMParser parseFromString"],["null","TrustedHTML","DOMParser parseFromString"],["<root/>","TrustedHTML","DOMParser parseFromString"]]}"#
-    );
-}
diff --git a/moli-renderer-v8/src/script_vm/tests/dom_xhr/xhr.rs b/moli-renderer-v8/src/script_vm/tests/dom_xhr/xhr.rs
index 7d6ccb6f7..882000a83 100644
--- a/moli-renderer-v8/src/script_vm/tests/dom_xhr/xhr.rs
+++ b/moli-renderer-v8/src/script_vm/tests/dom_xhr/xhr.rs
@@ -4084,57 +4084,3 @@ async fn streaming_xhr_materialization_failure_errors_body_source_before_close()
         vec![crate::types::PendingSubresourceContinueEvent::Completed { internal_id }]
     );
 }
-
-#[tokio::test(flavor = "current_thread")]
-async fn window_xhr_open_freezes_base_url_and_applies_url_credentials() {
-    let server = StaticHttpServer::spawn(1).await;
-    let base_url = server.base_url();
-    let loader = static_http_loader(std::iter::empty::<String>());
-    let mut vm = new_page_task_executor_test_vm_with_loader(
-        base_url
-            .join("page.html")
-            .expect("page fixture URL")
-            .as_str(),
-        &loader,
-    );
-    let first_base = base_url.join("first/").expect("first base URL");
-    let second_base = base_url.join("second/").expect("second base URL");
-
-    vm.eval(&format!(
-        r#"
-(() => {{
-  globalThis.__xhrOpenUrlProbe = "pending";
-  const base = document.createElement("base");
-  base.href = {};
-  document.head.append(base);
-  const xhr = new XMLHttpRequest();
-  xhr.open("GET", "resource", true, "alice", "secret");
-  base.href = {};
-  xhr.onload = () => {{ globalThis.__xhrOpenUrlProbe = "done"; }};
-  xhr.onerror = () => {{ globalThis.__xhrOpenUrlProbe = "error"; }};
-  xhr.send();
-  return "started";
-}})()
-"#,
-        serde_json::to_string(first_base.as_str()).expect("serialize first base URL"),
-        serde_json::to_string(second_base.as_str()).expect("serialize second base URL"),
-    ))
-    .expect("XHR open URL probe should evaluate");
-
-    advance_page_task_executor_until_eval_equals(
-        &mut vm,
-        &loader,
-        "String(globalThis.__xhrOpenUrlProbe)",
-        "done",
-        "XHR open URL probe",
-    )
-    .await;
-
-    let requests = server.finish().await;
-    assert_eq!(requests.len(), 1);
-    assert_eq!(requests[0].target, "/first/resource");
-    assert_eq!(
-        requests[0].header_value("authorization"),
-        Some("Basic YWxpY2U6c2VjcmV0")
-    );
-}
diff --git a/moli-renderer-v8/src/structured_clone.rs b/moli-renderer-v8/src/structured_clone.rs
index f99bc1d95..5658c141c 100644
--- a/moli-renderer-v8/src/structured_clone.rs
+++ b/moli-renderer-v8/src/structured_clone.rs
@@ -11,22 +11,21 @@ use crate::{
         CryptoKeyAlgorithmClonePayload, CryptoKeyClonePayload, FileSystemFileSnapshotClonePayload,
         FileSystemHandleClonePayload, GeometryClonePayload, ImageDataClonePayload,
         ReadableStreamClonePayload, TransformStreamClonePayload, WritableStreamClonePayload,
-        attach_file_system_file_snapshot_clone_payload, build_file_object,
-        build_file_list_object, file_list_files_from_object,
-        build_file_system_handle_from_clone_payload, build_image_data_object_from_clone_payload,
-        build_readable_stream_clone_shell, build_transform_stream_clone_shell,
-        build_writable_stream_clone_shell, crypto_key_clone_payload_from_object,
-        crypto_key_object_from_clone_payload, detach_message_port_owner_for_transfer,
-        detach_transferred_message_port, dom_exception_clone_fields,
-        ensure_message_port_wrapper_for_id, file_system_file_snapshot_clone_payload_from_object,
-        file_system_handle_clone_payload_from_object, image_data_clone_payload_from_object,
-        initialize_readable_stream_clone_shell, initialize_transform_stream_clone_shell,
-        initialize_writable_stream_clone_shell, message_port_id_from_object,
-        new_dom_exception_value, new_quota_exceeded_error_value, prepare_readable_stream_transfer,
-        prepare_transform_stream_transfer, prepare_writable_stream_transfer,
-        quota_exceeded_error_clone_fields, require_internal_stream_value,
-        selected_file_from_object,
-        build_geometry_object_from_clone_payload, geometry_clone_payload_from_object,
+        attach_file_system_file_snapshot_clone_payload, build_file_list_object, build_file_object,
+        build_file_system_handle_from_clone_payload, build_geometry_object_from_clone_payload,
+        build_image_data_object_from_clone_payload, build_readable_stream_clone_shell,
+        build_transform_stream_clone_shell, build_writable_stream_clone_shell,
+        crypto_key_clone_payload_from_object, crypto_key_object_from_clone_payload,
+        detach_message_port_owner_for_transfer, detach_transferred_message_port,
+        dom_exception_clone_fields, ensure_message_port_wrapper_for_id,
+        file_list_files_from_object, file_system_file_snapshot_clone_payload_from_object,
+        file_system_handle_clone_payload_from_object, geometry_clone_payload_from_object,
+        image_data_clone_payload_from_object, initialize_readable_stream_clone_shell,
+        initialize_transform_stream_clone_shell, initialize_writable_stream_clone_shell,
+        message_port_id_from_object, new_dom_exception_value, new_quota_exceeded_error_value,
+        prepare_readable_stream_transfer, prepare_transform_stream_transfer,
+        prepare_writable_stream_transfer, quota_exceeded_error_clone_fields,
+        require_internal_stream_value, selected_file_from_object,
     },
     dom::native::SelectedFile,
     types::MessagePortId,
@@ -379,7 +378,10 @@ impl v8::ValueSerializerImpl for WireSerializer {
                     return Some(true);
                 }
             }
-            Some("DOMPoint" | "DOMPointReadOnly" | "DOMRect" | "DOMRectReadOnly" | "DOMQuad" | "DOMMatrix" | "DOMMatrixReadOnly") => {
+            Some(
+                "DOMPoint" | "DOMPointReadOnly" | "DOMRect" | "DOMRectReadOnly" | "DOMQuad"
+                | "DOMMatrix" | "DOMMatrixReadOnly",
+            ) => {
                 if let Some(payload) = geometry_clone_payload_from_object(scope, object) {
                     write_geometry_clone_payload(serializer, payload);
                     return Some(true);
@@ -465,7 +467,10 @@ impl v8::ValueSerializerImpl for WireSerializer {
                     return None;
                 };
                 let Ok(length) = u32::try_from(files.len()) else {
-                    throw_data_clone_exception(scope, "Too many Files in structured clone FileList.");
+                    throw_data_clone_exception(
+                        scope,
+                        "Too many Files in structured clone FileList.",
+                    );
                     return None;
                 };
                 let mut clone_ids = Vec::with_capacity(files.len());