Fix test which expected iframe load for initial about:blank.

components/constellation/constellation.rs

@@ -944,7 +944,6 @@ where
     #[allow(clippy::too_many_arguments)]
     fn new_pipeline(
         &mut self,
-        pipeline_id: PipelineId,
         browsing_context_id: BrowsingContextId,
         top_level_browsing_context_id: TopLevelBrowsingContextId,
         parent_pipeline_id: Option<PipelineId>,
@@ -962,6 +961,7 @@ where
         if self.shutting_down {
             return;
         }
+        let pipeline_id = load_data.new_pipeline_id.clone();
         debug!(
             "{}: Creating new pipeline in {}",
             pipeline_id, browsing_context_id
@@ -1431,6 +1431,8 @@ where
                     Referrer::NoReferrer,
                     None,
                     None,
+                    None,
+                    false,
                 );
                 let ctx_id = BrowsingContextId::from(top_level_browsing_context_id);
                 let pipeline_id = match self.browsing_contexts.get(&ctx_id) {
@@ -1676,8 +1678,8 @@ where
                 self.handle_abort_load_url_msg(source_pipeline_id);
             },
             // A page loaded has completed all parsing, script, and reflow messages have been sent.
-            FromScriptMsg::LoadComplete => {
+            FromScriptMsg::LoadComplete(is_initial_about_blank) => {
-                self.handle_load_complete_msg(source_top_ctx_id, source_pipeline_id)
+                self.handle_load_complete_msg(source_top_ctx_id, source_pipeline_id, is_initial_about_blank)
             },
             // Handle navigating to a fragment
             FromScriptMsg::NavigatedToFragment(new_url, replacement_enabled) => {
@@ -2867,6 +2869,7 @@ where
 
         let new_pipeline_id = PipelineId::new();
         let new_load_data = LoadData {
+            new_pipeline_id,
             crash: Some(
                 backtrace
                     .map(|b| format!("{}\n{}", reason, b))
@@ -2878,7 +2881,6 @@ where
         let sandbox = IFrameSandboxState::IFrameSandboxed;
         let is_private = false;
         self.new_pipeline(
-            new_pipeline_id,
             browsing_context_id,
             top_level_browsing_context_id,
             None,
@@ -2988,7 +2990,6 @@ where
         top_level_browsing_context_id: TopLevelBrowsingContextId,
     ) {
         let window_size = self.window_size.initial_viewport;
-        let pipeline_id = PipelineId::new();
         let browsing_context_id = BrowsingContextId::from(top_level_browsing_context_id);
         let load_data = LoadData::new(
             LoadOrigin::Constellation,
@@ -2997,7 +2998,10 @@ where
             Referrer::NoReferrer,
             None,
             None,
+            None,
+            false,
         );
+        let pipeline_id = load_data.new_pipeline_id.clone();
         let sandbox = IFrameSandboxState::IFrameUnsandboxed;
         let is_private = false;
         let throttled = false;
@@ -3022,7 +3026,6 @@ where
             .insert(new_bc_group_id, new_bc_group);
 
         self.new_pipeline(
-            pipeline_id,
             browsing_context_id,
             top_level_browsing_context_id,
             None,
@@ -3113,7 +3116,7 @@ where
     }
 
     #[tracing::instrument(skip(self), fields(servo_profiling = true))]
-    fn handle_subframe_loaded(&mut self, pipeline_id: PipelineId) {
+    fn handle_subframe_loaded(&mut self, pipeline_id: PipelineId, is_initial_about_blank: bool) {
         let browsing_context_id = match self.pipelines.get(&pipeline_id) {
             Some(pipeline) => pipeline.browsing_context_id,
             None => return warn!("{}: Subframe loaded after closure", pipeline_id),
@@ -3138,6 +3141,7 @@ where
             target: browsing_context_id,
             parent: parent_pipeline_id,
             child: pipeline_id,
+            is_initial_about_blank,
         };
         let result = match self.pipelines.get(&parent_pipeline_id) {
             Some(parent) => parent.event_loop.send(msg),
@@ -3180,7 +3184,6 @@ where
             parent_pipeline_id,
             browsing_context_id,
             top_level_browsing_context_id,
-            new_pipeline_id,
             is_private,
             mut replace,
             ..
@@ -3191,6 +3194,8 @@ where
             .old_pipeline_id
             .and_then(|id| self.pipelines.get(&id));
 
+        let new_pipeline_id = load_info.load_data.new_pipeline_id.clone();
+
         // Replacement enabled also takes into account whether the document is "completely loaded",
         // see https://html.spec.whatwg.org/multipage/#the-iframe-element:completely-loaded
         if let Some(old_pipeline) = old_pipeline {
@@ -3259,7 +3264,6 @@ where
 
         // Create the new pipeline, attached to the parent and push to pending changes
         self.new_pipeline(
-            new_pipeline_id,
             browsing_context_id,
             top_level_browsing_context_id,
             Some(parent_pipeline_id),
@@ -3285,13 +3289,14 @@ where
     fn handle_script_new_iframe(&mut self, load_info: IFrameLoadInfoWithData) {
         let IFrameLoadInfo {
             parent_pipeline_id,
-            new_pipeline_id,
             browsing_context_id,
             top_level_browsing_context_id,
             is_private,
             ..
         } = load_info.info;
 
+        let new_pipeline_id = load_info.load_data.new_pipeline_id.clone();
+
         let (script_sender, parent_browsing_context_id) =
             match self.pipelines.get(&parent_pipeline_id) {
                 Some(pipeline) => (pipeline.event_loop.clone(), pipeline.browsing_context_id),
@@ -3349,10 +3354,11 @@ where
             opener_pipeline_id,
             new_top_level_browsing_context_id,
             new_browsing_context_id,
-            new_pipeline_id,
         } = load_info;
 
-        let (script_sender, opener_browsing_context_id) =
+        let new_pipeline_id = load_data.new_pipeline_id.clone();
+
+        let (_script_sender, opener_browsing_context_id) =
             match self.pipelines.get(&opener_pipeline_id) {
                 Some(pipeline) => (pipeline.event_loop.clone(), pipeline.browsing_context_id),
                 None => {
@@ -3372,7 +3378,18 @@ where
                     );
                 },
             };
-        let pipeline = Pipeline::new(
+        self.new_pipeline(
+            new_browsing_context_id,
+            new_top_level_browsing_context_id,
+            Some(opener_pipeline_id),
+            Some(opener_browsing_context_id),
+            self.window_size.initial_viewport,
+            load_data,
+            IFrameSandboxState::IFrameUnsandboxed, //XXXjdm
+            is_opener_private,
+            is_opener_throttled,
+        );
+        /*let pipeline = Pipeline::new(
             new_pipeline_id,
             new_browsing_context_id,
             new_top_level_browsing_context_id,
@@ -3384,7 +3401,7 @@ where
         );
 
         assert!(!self.pipelines.contains_key(&new_pipeline_id));
-        self.pipelines.insert(new_pipeline_id, pipeline);
+        self.pipelines.insert(new_pipeline_id, pipeline);*/
         self.webviews.add(
             new_top_level_browsing_context_id,
             WebView {
@@ -3490,7 +3507,7 @@ where
                 );
             },
             Entry::Vacant(entry) => {
-                let _ = entry.insert((load_data.clone(), replace));
+                let _ = entry.insert((load_data.clone(), if load_data.replacing_pipeline.is_some() { HistoryEntryReplacement::Enabled } else { replace }));
             },
         };
         // Allow the embedder to handle the url itself
@@ -3531,6 +3548,7 @@ where
                 return None;
             },
         };
+        let new_pipeline_id = load_data.new_pipeline_id.clone();
         let (window_size, pipeline_id, parent_pipeline_id, is_private, is_throttled) =
             match self.browsing_contexts.get(&browsing_context_id) {
                 Some(ctx) => (
@@ -3602,10 +3620,8 @@ where
                     HistoryEntryReplacement::Disabled => None,
                 };
 
-                let new_pipeline_id = PipelineId::new();
                 let sandbox = IFrameSandboxState::IFrameUnsandboxed;
                 self.new_pipeline(
-                    new_pipeline_id,
                     browsing_context_id,
                     top_level_browsing_context_id,
                     None,
@@ -3653,6 +3669,7 @@ where
         &mut self,
         top_level_browsing_context_id: TopLevelBrowsingContextId,
         pipeline_id: PipelineId,
+        is_initial_about_blank: bool,
     ) {
         let mut webdriver_reset = false;
         if let Some((expected_pipeline_id, ref reply_chan)) = self.webdriver.load_channel {
@@ -3693,7 +3710,7 @@ where
                     .send(CompositorMsg::LoadComplete(top_level_browsing_context_id));
             }
         } else {
-            self.handle_subframe_loaded(pipeline_id);
+            self.handle_subframe_loaded(pipeline_id, is_initial_about_blank);
         }
     }
 
@@ -3909,9 +3926,8 @@ where
                     Some(pipeline) => pipeline.opener,
                     None => None,
                 };
-                let new_pipeline_id = PipelineId::new();
+                let new_pipeline_id = load_data.new_pipeline_id.clone();
                 self.new_pipeline(
-                    new_pipeline_id,
                     browsing_context_id,
                     top_level_id,
                     parent_pipeline_id,

components/constellation/pipeline.rs

@@ -229,10 +229,12 @@ impl Pipeline {
                     window_size: state.window_size,
                 };
 
-                if let Err(e) =
+                if !state.load_data.synchronously_loaded {
-                    script_chan.send(ConstellationControlMsg::AttachLayout(new_layout_info))
+                    if let Err(e) =
-                {
+                        script_chan.send(ConstellationControlMsg::AttachLayout(new_layout_info))
-                    warn!("Sending to script during pipeline creation failed ({})", e);
+                    {
+                        warn!("Sending to script during pipeline creation failed ({})", e);
+                    }
                 }
                 (script_chan, None)
             },

components/constellation/tracing.rs

@@ -1,3 +1,4 @@
+
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
@@ -156,7 +157,7 @@ mod from_script {
                 Self::GetTopForBrowsingContext(..) => target!("GetTopForBrowsingContext"),
                 Self::GetBrowsingContextInfo(..) => target!("GetBrowsingContextInfo"),
                 Self::GetChildBrowsingContextId(..) => target!("GetChildBrowsingContextId"),
-                Self::LoadComplete => target!("LoadComplete"),
+                Self::LoadComplete(..) => target!("LoadComplete"),
                 Self::LoadUrl(..) => target!("LoadUrl"),
                 Self::AbortLoadUrl => target!("AbortLoadUrl"),
                 Self::PostMessage { .. } => target!("PostMessage"),

components/script/canvas_state.rs

@@ -262,7 +262,7 @@ impl CanvasState {
             CanvasImageSource::HTMLCanvasElement(canvas) => canvas.origin_is_clean(),
             CanvasImageSource::OffscreenCanvas(canvas) => canvas.origin_is_clean(),
             CanvasImageSource::HTMLImageElement(image) => {
-                image.same_origin(GlobalScope::entry().origin())
+                image.same_origin(&GlobalScope::entry().origin())
             },
             CanvasImageSource::CSSStyleValue(_) => true,
         }

components/script/dom/bindings/codegen/CodegenRust.py

@@ -3020,7 +3020,7 @@ create_global_object(
     raw.as_ptr() as *const libc::c_void,
     _trace,
     obj.handle_mut(),
-    origin);
+    &origin);
 assert!(!obj.is_null());
 
 let root = raw.reflect_with(obj.get());

components/script/dom/bindings/interface.rs

@@ -162,8 +162,7 @@ pub unsafe fn create_global_object(
 
     // Initialize the reserved slots before doing anything that can GC, to
     // avoid getting trace hooks called on a partially initialized object.
-    let private_val = PrivateValue(private);
+    set_reflector_object(rval.handle(), private);
-    JS_SetReservedSlot(rval.get(), DOM_OBJECT_SLOT, &private_val);
     let proto_array: Box<ProtoOrIfaceArray> =
         Box::new([ptr::null_mut::<JSObject>(); PrototypeList::PROTO_OR_IFACE_LENGTH]);
     let val = PrivateValue(Box::into_raw(proto_array) as *const libc::c_void);
@@ -173,6 +172,11 @@ pub unsafe fn create_global_object(
     JS_FireOnNewGlobalObject(*cx, rval.handle());
 }
 
+pub(crate) unsafe fn set_reflector_object(reflector: HandleObject, private: *const libc::c_void) {
+    let private_val = PrivateValue(private);
+    JS_SetReservedSlot(reflector.get(), DOM_OBJECT_SLOT, &private_val);
+}
+
 /// Choose the compartment to create a new global object in.
 fn select_compartment(cx: SafeJSContext, options: &mut RealmOptions) {
     type Data = *mut Compartment;

components/script/dom/document.rs

@@ -178,7 +178,7 @@ use crate::dom::wheelevent::WheelEvent;
 use crate::dom::window::{ReflowReason, Window};
 use crate::dom::windowproxy::WindowProxy;
 use crate::fetch::FetchCanceller;
-use crate::realms::{AlreadyInRealm, InRealm};
+use crate::realms::{AlreadyInRealm, InRealm, enter_realm};
 use crate::script_runtime::{CanGc, CommonScriptMsg, ScriptThreadEventCategory};
 use crate::script_thread::{MainThreadScriptMsg, ScriptThread};
 use crate::stylesheet_set::StylesheetSetRef;
@@ -486,6 +486,9 @@ pub struct Document {
     visibility_state: Cell<DocumentVisibilityState>,
     /// <https://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml>
     status_code: Option<u16>,
+    inhibit_load_and_pageshow: Cell<bool>,
+    window_replaced: Cell<bool>,
+    is_initial_about_blank: Cell<bool>,
 }
 
 #[derive(JSTraceable, MallocSizeOf)]
@@ -539,6 +542,10 @@ impl CollectionFilter for AnchorsFilter {
 
 #[allow(non_snake_case)]
 impl Document {
+    pub(crate) fn is_initial_about_blank(&self) -> bool {
+        self.is_initial_about_blank.get()
+    }
+
     pub fn note_node_with_dirty_descendants(&self, node: &Node) {
         debug_assert!(*node.owner_doc() == *self);
         if !node.is_connected() {
@@ -708,7 +715,9 @@ impl Document {
             ClientContextId::build(pipeline_id.namespace_id.0, pipeline_id.index.0.get());
 
         if activity != DocumentActivity::FullyActive {
-            self.window().suspend();
+            if self.is_window_relevant() {
+                self.window().suspend();
+            }
             media.suspend(&client_context_id);
             return;
         }
@@ -2320,8 +2329,10 @@ impl Document {
         if !self.salvageable.get() {
             // Step 1 of clean-up steps.
             global_scope.close_event_sources();
-            let msg = ScriptMsg::DiscardDocument;
+            if self.is_window_relevant() {
-            let _ = global_scope.script_to_constellation_chan().send(msg);
+                let msg = ScriptMsg::DiscardDocument;
+                let _ = global_scope.script_to_constellation_chan().send(msg);
+            }
         }
         // https://w3c.github.io/FileAPI/#lifeTime
         global_scope.clean_up_all_file_resources();
@@ -2358,17 +2369,20 @@ impl Document {
         // Step 7.
         debug!("Document loads are complete.");
         let document = Trusted::new(self);
+        let was_initial_about_blank = self.is_initial_about_blank.get();
         self.window
             .task_manager()
             .dom_manipulation_task_source()
             .queue(
-                task!(fire_load_event: move || {
+                task!(prepare_for_post_load_tasks: move || {
                     let document = document.root();
                     let window = document.window();
                     if !window.is_alive() {
                         return;
                     }
 
+                    notify_constellation_load(&window, was_initial_about_blank);
+
                     // Step 7.1.
                     document.set_ready_state(DocumentReadyState::Complete);
 
@@ -2387,37 +2401,19 @@ impl Document {
                     // http://w3c.github.io/navigation-timing/#widl-PerformanceNavigationTiming-loadEventStart
                     update_with_current_instant(&document.load_event_start);
 
-                    debug!("About to dispatch load for {:?}", document.url());
+                    if !document.inhibit_load_and_pageshow.get() {
-                    // FIXME(nox): Why are errors silenced here?
+                        debug!("About to dispatch load for {:?}", document.url());
-                    let _ = window.dispatch_event_with_target_override(
+                        // FIXME(nox): Why are errors silenced here?
-                        &event,
+                        let _ = window.dispatch_event_with_target_override(
-                    );
+                            &event,
+                        );
+                    }
 
                     // http://w3c.github.io/navigation-timing/#widl-PerformanceNavigationTiming-loadEventEnd
                     update_with_current_instant(&document.load_event_end);
 
-                    if let Some(fragment) = document.url().fragment() {
+                    //assert!(!document.page_showing.get());
-                        document.check_and_scroll_fragment(fragment);
+                    if !document.page_showing.get() {
-                    }
-                }),
-                self.window.upcast(),
-            )
-            .unwrap();
-
-        // Step 8.
-        let document = Trusted::new(self);
-        if document.root().browsing_context().is_some() {
-            self.window
-                .task_manager()
-                .dom_manipulation_task_source()
-                .queue(
-                    task!(fire_pageshow_event: move || {
-                        let document = document.root();
-                        let window = document.window();
-                        if document.page_showing.get() || !window.is_alive() {
-                            return;
-                        }
-
                         document.page_showing.set(true);
 
                         let event = PageTransitionEvent::new(
@@ -2434,11 +2430,15 @@ impl Document {
                         let _ = window.dispatch_event_with_target_override(
                             event,
                         );
-                    }),
+                    }
-                    self.window.upcast(),
+
-                )
+                    if let Some(fragment) = document.url().fragment() {
-                .unwrap();
+                        document.check_and_scroll_fragment(fragment);
-        }
+                    }
+                }),
+                self.window.upcast(),
+            )
+            .unwrap();
 
         // Step 9.
         // TODO: pending application cache download process tasks.
@@ -2482,10 +2482,10 @@ impl Document {
                                 }),
                                 Duration::from_secs(*time),
                             );
-                        }
+                        };
                         // Note: this will, among others, result in the "iframe-load-event-steps" being run.
                         // https://html.spec.whatwg.org/multipage/#iframe-load-event-steps
-                        document.notify_constellation_load();
+                        //document.notify_constellation_load();
                     }),
                     self.window.upcast(),
                 )
@@ -2641,9 +2641,10 @@ impl Document {
             .dom_manipulation_task_source()
             .queue(
                 task!(fire_dom_content_loaded_event: move || {
-                let document = document.root();
+                    let document = document.root();
-                document.upcast::<EventTarget>().fire_bubbling_event(atom!("DOMContentLoaded"));
+                    let _realm = enter_realm(&*document);
-                update_with_current_instant(&document.dom_content_loaded_event_end);
+                    document.upcast::<EventTarget>().fire_bubbling_event(atom!("DOMContentLoaded"));
+                    update_with_current_instant(&document.dom_content_loaded_event_end);
                 }),
                 window.upcast(),
             )
@@ -2701,10 +2702,6 @@ impl Document {
         }
     }
 
-    pub fn notify_constellation_load(&self) {
-        self.window().send_to_constellation(ScriptMsg::LoadComplete);
-    }
-
     pub fn set_current_parser(&self, script: Option<&ServoParser>) {
         self.current_parser.set(script);
     }
@@ -3180,6 +3177,7 @@ impl Document {
         referrer_policy: Option<ReferrerPolicy>,
         status_code: Option<u16>,
         canceller: FetchCanceller,
+        inhibit_load_and_pageshow: bool,
     ) -> Document {
         let url = url.unwrap_or_else(|| ServoUrl::parse("about:blank").unwrap());
 
@@ -3206,6 +3204,7 @@ impl Document {
             .and_then(|charset| Encoding::for_label(charset.as_str().as_bytes()))
             .unwrap_or(UTF_8);
 
+        let is_initial_about_blank = url.as_str() == "about:blank";
         let has_browsing_context = has_browsing_context == HasBrowsingContext::Yes;
         Document {
             node: Node::new_document_node(),
@@ -3327,9 +3326,20 @@ impl Document {
             fonts: Default::default(),
             visibility_state: Cell::new(DocumentVisibilityState::Hidden),
             status_code,
+            inhibit_load_and_pageshow: Cell::new(inhibit_load_and_pageshow),
+            window_replaced: Cell::new(false),
+            is_initial_about_blank: Cell::new(is_initial_about_blank),
         }
     }
 
+    pub(crate) fn disown_window(&self) {
+        self.window_replaced.set(true);
+    }
+
+    pub(crate) fn is_window_relevant(&self) -> bool {
+        !self.window_replaced.get()
+    }
+
     /// Note a pending animation tick, to be processed at the next `update_the_rendering` task.
     pub fn note_pending_animation_tick(&self, tick_type: AnimationTickType) {
         self.pending_animation_ticks.borrow_mut().extend(tick_type);
@@ -3475,6 +3485,7 @@ impl Document {
             None,
             Default::default(),
             can_gc,
+            false,
         ))
     }
 
@@ -3495,6 +3506,7 @@ impl Document {
         status_code: Option<u16>,
         canceller: FetchCanceller,
         can_gc: CanGc,
+        inhibit_load_and_pageshow: bool,
     ) -> DomRoot<Document> {
         Self::new_with_proto(
             window,
@@ -3513,6 +3525,7 @@ impl Document {
             status_code,
             canceller,
             can_gc,
+            inhibit_load_and_pageshow,
         )
     }
 
@@ -3534,6 +3547,7 @@ impl Document {
         status_code: Option<u16>,
         canceller: FetchCanceller,
         can_gc: CanGc,
+        inhibit_load_and_pageshow: bool,
     ) -> DomRoot<Document> {
         let document = reflect_dom_object_with_proto(
             Box::new(Document::new_inherited(
@@ -3551,6 +3565,7 @@ impl Document {
                 referrer_policy,
                 status_code,
                 canceller,
+                inhibit_load_and_pageshow,
             )),
             window,
             proto,
@@ -3676,6 +3691,7 @@ impl Document {
                     None,
                     Default::default(),
                     can_gc,
+                    false,
                 );
                 new_doc
                     .appropriate_template_contents_owner_document
@@ -5277,12 +5293,16 @@ impl DocumentMethods for Document {
             self.set_url(new_url);
         }
 
+        self.inhibit_load_and_pageshow.set(false);
+
         // Step 13
         // TODO: https://github.com/servo/servo/issues/21938
 
         // Step 14
         self.set_quirks_mode(QuirksMode::NoQuirks);
 
+        self.is_initial_about_blank.set(false);
+
         // Step 15
         let resource_threads = self
             .window
@@ -5652,3 +5672,8 @@ fn is_named_element_with_id_attribute(elem: &Element) -> bool {
     // behaviour is actually implemented
     elem.is::<HTMLImageElement>() && elem.get_name().is_some_and(|name| !name.is_empty())
 }
+
+fn notify_constellation_load(window: &Window, is_initial_about_blank: bool) {
+    window.send_to_constellation(ScriptMsg::LoadComplete(is_initial_about_blank));
+}
+

components/script/dom/domimplementation.rs

@@ -160,6 +160,7 @@ impl DOMImplementationMethods for DOMImplementation {
             None,
             Default::default(),
             can_gc,
+            false,
         );
 
         {

components/script/dom/domparser.rs

@@ -89,6 +89,7 @@ impl DOMParserMethods for DOMParser {
                     None,
                     Default::default(),
                     can_gc,
+                    false,
                 );
                 ServoParser::parse_html_document(&document, Some(s), url, CanGc::note());
                 document.set_ready_state(DocumentReadyState::Complete);
@@ -111,6 +112,7 @@ impl DOMParserMethods for DOMParser {
                     None,
                     Default::default(),
                     can_gc,
+                    false,
                 );
                 ServoParser::parse_xml_document(&document, Some(s), url, CanGc::note());
                 document.set_ready_state(DocumentReadyState::Complete);

components/script/dom/globalscope.rs

@@ -3,10 +3,10 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 use std::borrow::Cow;
-use std::cell::Cell;
+use std::cell::{Cell, RefCell, Ref};
 use std::collections::hash_map::Entry;
 use std::collections::{HashMap, VecDeque};
-use std::ops::Index;
+use std::ops::{Deref, Index};
 use std::rc::Rc;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Arc;
@@ -208,7 +208,7 @@ pub struct GlobalScope {
 
     /// Pipeline id associated with this global.
     #[no_trace]
-    pipeline_id: PipelineId,
+    pipeline_id: Cell<PipelineId>,
 
     /// A flag to indicate whether the developer tools has requested
     /// live updates from the worker.
@@ -243,7 +243,7 @@ pub struct GlobalScope {
     /// A handle for communicating messages to the constellation thread.
     #[ignore_malloc_size_of = "channels are hard"]
     #[no_trace]
-    script_to_constellation_chan: ScriptToConstellationChan,
+    script_to_constellation_chan: RefCell<ScriptToConstellationChan>,
 
     #[ignore_malloc_size_of = "channels are hard"]
     #[no_trace]
@@ -266,11 +266,11 @@ pub struct GlobalScope {
 
     /// The origin of the globalscope
     #[no_trace]
-    origin: MutableOrigin,
+    origin: RefCell<MutableOrigin>,
 
     /// <https://html.spec.whatwg.org/multipage/#concept-environment-creation-url>
     #[no_trace]
-    creation_url: Option<ServoUrl>,
+    creation_url: RefCell<Option<ServoUrl>>,
 
     /// A map for storing the previous permission state read results.
     permission_state_invocation_results: DomRefCell<HashMap<String, PermissionState>>,
@@ -779,7 +779,7 @@ impl GlobalScope {
             crypto: Default::default(),
             registration_map: DomRefCell::new(HashMapTracedValues::new()),
             worker_map: DomRefCell::new(HashMapTracedValues::new()),
-            pipeline_id,
+            pipeline_id: Cell::new(pipeline_id),
             devtools_wants_updates: Default::default(),
             console_timers: DomRefCell::new(Default::default()),
             module_map: DomRefCell::new(Default::default()),
@@ -787,14 +787,14 @@ impl GlobalScope {
             devtools_chan,
             mem_profiler_chan,
             time_profiler_chan,
-            script_to_constellation_chan,
+            script_to_constellation_chan: RefCell::new(script_to_constellation_chan),
             scheduler_chan: scheduler_chan.clone(),
             in_error_reporting_mode: Default::default(),
             resource_threads,
             timers: OneshotTimers::new(scheduler_chan),
             init_timers: Default::default(),
-            origin,
+            origin: RefCell::new(origin),
-            creation_url,
+            creation_url: RefCell::new(creation_url),
             permission_state_invocation_results: Default::default(),
             microtask_queue,
             list_auto_close_worker: Default::default(),
@@ -2318,7 +2318,7 @@ impl GlobalScope {
     pub fn issue_page_warning(&self, warning: &str) {
         if let Some(ref chan) = self.devtools_chan {
             let _ = chan.send(ScriptToDevtoolsControlMsg::ReportPageError(
-                self.pipeline_id,
+                self.pipeline_id.get(),
                 PageError {
                     type_: "PageError".to_string(),
                     error_message: warning.to_string(),
@@ -2352,8 +2352,8 @@ impl GlobalScope {
     }
 
     /// Get a sender to the constellation thread.
-    pub fn script_to_constellation_chan(&self) -> &ScriptToConstellationChan {
+    pub fn script_to_constellation_chan(&self) -> Ref<ScriptToConstellationChan> {
-        &self.script_to_constellation_chan
+        self.script_to_constellation_chan.borrow()
     }
 
     pub fn send_to_embedder(&self, msg: EmbedderMsg) {
@@ -2370,17 +2370,17 @@ impl GlobalScope {
 
     /// Get the `PipelineId` for this global scope.
     pub fn pipeline_id(&self) -> PipelineId {
-        self.pipeline_id
+        self.pipeline_id.get()
     }
 
     /// Get the origin for this global scope
-    pub fn origin(&self) -> &MutableOrigin {
+    pub fn origin(&self) -> Ref<MutableOrigin> {
-        &self.origin
+        self.origin.borrow()
     }
 
     /// Get the creation_url for this global scope
-    pub fn creation_url(&self) -> &Option<ServoUrl> {
+    pub fn creation_url(&self) -> Ref<Option<ServoUrl>> {
-        &self.creation_url
+        self.creation_url.borrow()
     }
 
     pub fn image_cache(&self) -> Arc<dyn ImageCache> {
@@ -2513,7 +2513,7 @@ impl GlobalScope {
             } else if self.is::<Window>() {
                 if let Some(ref chan) = self.devtools_chan {
                     let _ = chan.send(ScriptToDevtoolsControlMsg::ReportPageError(
-                        self.pipeline_id,
+                        self.pipeline_id.get(),
                         PageError {
                             type_: "PageError".to_string(),
                             error_message: error_info.message.clone(),
@@ -3129,7 +3129,7 @@ impl GlobalScope {
         if Some(false) == self.inherited_secure_context {
             return false;
         }
-        if let Some(creation_url) = self.creation_url() {
+        if let Some(creation_url) = self.creation_url().deref() {
             if creation_url.scheme() == "blob" && Some(true) == self.inherited_secure_context {
                 return true;
             }
@@ -3400,6 +3400,27 @@ impl GlobalScope {
 
         Ok(message_clone.get())
     }
+
+    pub(crate) fn replace_contents(&self, data: ReplaceData) {
+        let ReplaceData {
+            pipeline_id,
+            script_to_constellation_chan,
+            creator_url,
+            origin,
+        } = data;
+        self.pipeline_id.set(pipeline_id);
+        *self.script_to_constellation_chan.borrow_mut() = script_to_constellation_chan;
+        *self.creation_url.borrow_mut() = Some(creator_url);
+        *self.origin.borrow_mut() = origin;
+        self.timers.reset();
+    }
+}
+
+pub(crate) struct ReplaceData {
+    pub pipeline_id: PipelineId,
+    pub script_to_constellation_chan: ScriptToConstellationChan,
+    pub creator_url: ServoUrl,
+    pub origin: MutableOrigin,
 }
 
 /// Returns the Rust global scope from a JS global object.

components/script/dom/htmlformelement.rs

@@ -63,6 +63,7 @@ use crate::dom::htmldatalistelement::HTMLDataListElement;
 use crate::dom::htmlelement::HTMLElement;
 use crate::dom::htmlfieldsetelement::HTMLFieldSetElement;
 use crate::dom::htmlformcontrolscollection::HTMLFormControlsCollection;
+use crate::dom::htmliframeelement::HTMLIFrameElement;
 use crate::dom::htmlimageelement::HTMLImageElement;
 use crate::dom::htmlinputelement::{HTMLInputElement, InputType};
 use crate::dom::htmllabelelement::HTMLLabelElement;
@@ -831,6 +832,8 @@ impl HTMLFormElement {
             target_window.upcast::<GlobalScope>().get_referrer(),
             target_document.get_referrer_policy(),
             Some(target_window.upcast::<GlobalScope>().is_secure_context()),
+            (doc.url().as_str() == "about:blank").then(|| doc.window().pipeline_id()),
+            false,
         );
 
         // Step 22
@@ -988,6 +991,14 @@ impl HTMLFormElement {
         load_data.referrer = referrer;
         load_data.referrer_policy = referrer_policy;
 
+        let new_pipeline_id = load_data.new_pipeline_id.clone();
+        let proxy = target.window_proxy();
+        if let Some(frame) = proxy.frame_element() {
+            if let Some(frame) = frame.downcast::<HTMLIFrameElement>() {
+                frame.update_pending_pipeline_id(new_pipeline_id);
+            }
+        }
+
         // Step 4.
         let this = Trusted::new(self);
         let window = Trusted::new(target);

components/script/dom/htmliframeelement.rs

@@ -8,6 +8,7 @@ use base::id::{BrowsingContextId, PipelineId, TopLevelBrowsingContextId};
 use bitflags::bitflags;
 use dom_struct::dom_struct;
 use html5ever::{local_name, namespace_url, ns, LocalName, Prefix};
+use js::jsapi::JSAutoRealm;
 use js::rust::HandleObject;
 use profile_traits::ipc as ProfiledIpc;
 use script_traits::IFrameSandboxState::{IFrameSandboxed, IFrameUnsandboxed};
@@ -40,6 +41,8 @@ use crate::dom::node::{
 };
 use crate::dom::virtualmethods::VirtualMethods;
 use crate::dom::windowproxy::WindowProxy;
+use crate::microtask::{Microtask, MicrotaskRunnable};
+use crate::realms::enter_realm;
 use crate::script_runtime::CanGc;
 use crate::script_thread::ScriptThread;
 
@@ -177,7 +180,7 @@ impl HTMLIFrameElement {
 
         let window = window_from_node(self);
         let old_pipeline_id = self.pipeline_id();
-        let new_pipeline_id = PipelineId::new();
+        let new_pipeline_id = load_data.new_pipeline_id.clone();
         self.pending_pipeline_id.set(Some(new_pipeline_id));
 
         let global_scope = window.upcast::<GlobalScope>();
@@ -185,7 +188,6 @@ impl HTMLIFrameElement {
             parent_pipeline_id: global_scope.pipeline_id(),
             browsing_context_id,
             top_level_browsing_context_id,
-            new_pipeline_id,
             is_private: false, // FIXME
             inherited_secure_context: load_data.inherited_secure_context,
             replace,
@@ -261,6 +263,8 @@ impl HTMLIFrameElement {
                 window.upcast::<GlobalScope>().get_referrer(),
                 document.get_referrer_policy(),
                 Some(window.upcast::<GlobalScope>().is_secure_context()),
+                None, //XXXjdm
+                false,
             );
             let element = self.upcast::<Element>();
             load_data.srcdoc = String::from(element.get_string_attribute(&local_name!("srcdoc")));
@@ -288,9 +292,14 @@ impl HTMLIFrameElement {
             }
         }
 
-        if mode == ProcessingMode::FirstTime &&
+        let element = self.upcast::<Element>();
-            !self.upcast::<Element>().has_attribute(&local_name!("src"))
+        let src = element.get_string_attribute(&local_name!("src"));
-        {
+        if mode == ProcessingMode::FirstTime && (src.is_empty() || src == "about:blank") {
+            let task = IframeElementMicrotask {
+                elem: DomRoot::from_ref(self),
+                about_blank_pipeline: self.about_blank_pipeline_id.get().unwrap(),
+            };
+            ScriptThread::await_stable_state(Microtask::IframeElement(task));
             return;
         }
 
@@ -332,6 +341,9 @@ impl HTMLIFrameElement {
         };
 
         let document = document_from_node(self);
+        let pipeline_id = self.pipeline_id();
+        let is_about_blank = pipeline_id.is_some() && pipeline_id == self.about_blank_pipeline_id.get();
+        let replaced_pipeline = is_about_blank.then(|| self.about_blank_pipeline_id.get().unwrap());
         let load_data = LoadData::new(
             LoadOrigin::Script(document.origin().immutable().clone()),
             url,
@@ -339,13 +351,12 @@ impl HTMLIFrameElement {
             window.upcast::<GlobalScope>().get_referrer(),
             document.get_referrer_policy(),
             Some(window.upcast::<GlobalScope>().is_secure_context()),
+            replaced_pipeline,
+            false,
         );
 
-        let pipeline_id = self.pipeline_id();
         // If the initial `about:blank` page is the current page, load with replacement enabled,
         // see https://html.spec.whatwg.org/multipage/#the-iframe-element:about:blank-3
-        let is_about_blank =
-            pipeline_id.is_some() && pipeline_id == self.about_blank_pipeline_id.get();
         let replace = if is_about_blank {
             HistoryEntryReplacement::Enabled
         } else {
@@ -381,6 +392,8 @@ impl HTMLIFrameElement {
             window.upcast::<GlobalScope>().get_referrer(),
             document.get_referrer_policy(),
             Some(window.upcast::<GlobalScope>().is_secure_context()),
+            None,
+            true,
         );
         let browsing_context_id = BrowsingContextId::new();
         let top_level_browsing_context_id = window.window_proxy().top_level_browsing_context_id();
@@ -405,6 +418,10 @@ impl HTMLIFrameElement {
         self.browsing_context_id.set(None);
     }
 
+    pub(crate) fn update_pending_pipeline_id(&self, pending: PipelineId) {
+        self.pending_pipeline_id.set(Some(pending));
+    }
+
     pub fn update_pipeline_id(
         &self,
         new_pipeline_id: PipelineId,
@@ -488,13 +505,24 @@ impl HTMLIFrameElement {
     }
 
     /// <https://html.spec.whatwg.org/multipage/#iframe-load-event-steps> steps 1-4
-    pub fn iframe_load_event_steps(&self, loaded_pipeline: PipelineId, can_gc: CanGc) {
+    pub fn iframe_load_event_steps(
+        &self,
+        loaded_pipeline: PipelineId,
+        can_gc: CanGc,
+        dispatch_load_for_about_blank: bool,
+    ) {
         // TODO(#9592): assert that the load blocker is present at all times when we
         //              can guarantee that it's created for the case of iframe.reload().
         if Some(loaded_pipeline) != self.pending_pipeline_id.get() {
             return;
         }
 
+        if Some(loaded_pipeline) == self.about_blank_pipeline_id.get() &&
+            !dispatch_load_for_about_blank
+        {
+            return;
+        }
+
         // TODO A cross-origin child document would not be easily accessible
         //      from this script thread. It's unclear how to implement
         //      steps 2, 3, and 5 efficiently in this case.
@@ -788,3 +816,21 @@ impl VirtualMethods for HTMLIFrameElement {
         self.destroy_nested_browsing_context();
     }
 }
+
+#[derive(JSTraceable, MallocSizeOf)]
+pub struct IframeElementMicrotask {
+    elem: DomRoot<HTMLIFrameElement>,
+    #[no_trace]
+    about_blank_pipeline: PipelineId,
+}
+
+impl MicrotaskRunnable for IframeElementMicrotask {
+    fn handler(&self, can_gc: CanGc) {
+        self.elem
+            .iframe_load_event_steps(self.about_blank_pipeline, can_gc, true);
+    }
+
+    fn enter_realm(&self) -> JSAutoRealm {
+        enter_realm(&*self.elem)
+    }
+}

components/script/dom/location.rs

@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
+use std::cell::Ref;
+
 use dom_struct::dom_struct;
 use net_traits::request::Referrer;
 use script_traits::{HistoryEntryReplacement, LoadData, LoadOrigin};
@@ -123,6 +125,8 @@ impl Location {
             referrer,
             referrer_policy,
             None, // Top navigation doesn't inherit secure context
+            (self.window.Document().url().as_str() == "about:blank").then(|| self.window.pipeline_id()),
+            false,
         );
         self.window
             .load_url(replacement_flag, reload_triggered, load_data);
@@ -249,7 +253,7 @@ impl Location {
     }
 
     #[allow(dead_code)]
-    pub fn origin(&self) -> &MutableOrigin {
+    pub fn origin(&self) -> Ref<MutableOrigin> {
         self.window.origin()
     }
 }
@@ -389,11 +393,14 @@ impl LocationMethods for Location {
         if self.has_document() {
             // Note: no call to self.check_same_origin_domain()
             // Step 2: Parse the given value relative to the entry settings object.
-            // If that failed, throw a TypeError exception.
+            // If that failed, throw a SyntaxError exception.
             let base_url = self.entry_settings_object().api_base_url();
             let url = match base_url.join(&value.0) {
                 Ok(url) => url,
-                Err(e) => return Err(Error::Type(format!("Couldn't parse URL: {}", e))),
+                Err(e) => {
+                    info!("Couldn't parse URL: {}", e);
+                    return Err(Error::Syntax);
+                }
             };
             // Step 3: Location-object navigate to the resulting URL record.
             self.navigate(

components/script/dom/node.rs

@@ -2299,6 +2299,7 @@ impl Node {
                     document.status_code(),
                     Default::default(),
                     CanGc::note(),
+                    false,
                 );
                 DomRoot::upcast::<Node>(document)
             },

components/script/dom/servoparser/mod.rs

@@ -216,6 +216,7 @@ impl ServoParser {
             None,
             Default::default(),
             can_gc,
+            false,
         );
 
         // Step 2.

components/script/dom/window.rs

@@ -3,7 +3,7 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 use std::borrow::{Cow, ToOwned};
-use std::cell::{Cell, RefCell, RefMut};
+use std::cell::{Cell, RefCell, RefMut, Ref as StdRef};
 use std::collections::hash_map::Entry;
 use std::collections::{HashMap, HashSet};
 use std::default::Default;
@@ -185,7 +185,7 @@ pub struct Window {
     globalscope: GlobalScope,
     #[ignore_malloc_size_of = "trait objects are hard"]
     script_chan: MainThreadScriptChan,
-    task_manager: TaskManager,
+    task_manager: RefCell<TaskManager>,
     #[no_trace]
     #[ignore_malloc_size_of = "TODO: Add MallocSizeOf support to layout"]
     layout: RefCell<Box<dyn Layout>>,
@@ -357,8 +357,8 @@ pub struct Window {
 }
 
 impl Window {
-    pub fn task_manager(&self) -> &TaskManager {
+    pub fn task_manager(&self) -> StdRef<TaskManager> {
-        &self.task_manager
+        self.task_manager.borrow()
     }
 
     pub fn layout(&self) -> Ref<Box<dyn Layout>> {
@@ -405,7 +405,8 @@ impl Window {
 
     /// Cancel all current, and ignore all subsequently queued, tasks.
     pub fn ignore_all_tasks(&self) {
-        let mut ignore_flags = self.task_manager.task_cancellers.borrow_mut();
+        let task_manager = self.task_manager.borrow();
+        let mut ignore_flags = task_manager.task_cancellers.borrow_mut();
         for task_source_name in TaskSourceName::all() {
             let flag = ignore_flags.entry(*task_source_name).or_default();
             flag.store(true, Ordering::SeqCst);
@@ -417,7 +418,7 @@ impl Window {
         self.globalscope.time_profiler_chan()
     }
 
-    pub fn origin(&self) -> &MutableOrigin {
+    pub fn origin(&self) -> Ref<MutableOrigin> {
         self.globalscope.origin()
     }
 
@@ -1635,7 +1636,8 @@ impl Window {
     /// This sets the current `task_manager.task_cancellers` sentinel value to
     /// `true` and replaces it with a brand new one for future tasks.
     pub fn cancel_all_tasks(&self) {
-        let mut ignore_flags = self.task_manager.task_cancellers.borrow_mut();
+        let task_manager = self.task_manager.borrow();
+        let mut ignore_flags = task_manager.task_cancellers.borrow_mut();
         for task_source_name in TaskSourceName::all() {
             let flag = ignore_flags.entry(*task_source_name).or_default();
             let cancelled = std::mem::take(&mut *flag);
@@ -1647,7 +1649,8 @@ impl Window {
     /// This sets the current sentinel value to
     /// `true` and replaces it with a brand new one for future tasks.
     pub fn cancel_all_tasks_from_source(&self, task_source_name: TaskSourceName) {
-        let mut ignore_flags = self.task_manager.task_cancellers.borrow_mut();
+        let task_manager = self.task_manager.borrow();
+        let mut ignore_flags = task_manager.task_cancellers.borrow_mut();
         let flag = ignore_flags.entry(task_source_name).or_default();
         let cancelled = std::mem::take(&mut *flag);
         cancelled.store(true, Ordering::SeqCst);
@@ -2207,13 +2210,13 @@ impl Window {
 
     #[allow(unsafe_code)]
     pub fn init_window_proxy(&self, window_proxy: &WindowProxy) {
-        assert!(self.window_proxy.get().is_none());
+        //assert!(self.window_proxy.get().is_none());
         self.window_proxy.set(Some(window_proxy));
     }
 
     #[allow(unsafe_code)]
     pub fn init_document(&self, document: &Document) {
-        assert!(self.document.get().is_none());
+        //assert!(self.document.get().is_none());
         assert!(document.window() == self);
         self.document.set(Some(document));
         if !self.unminify_js {
@@ -2267,6 +2270,7 @@ impl Window {
                     ScriptThreadEventCategory::DomEvent,
                     Box::new(
                         self.task_manager
+                            .borrow()
                             .task_canceller(TaskSourceName::DOMManipulation)
                             .wrap_task(task),
                     ),
@@ -2300,7 +2304,7 @@ impl Window {
             // TODO: step 11, navigationType.
             // Step 12, 13
             ScriptThread::navigate(
-                window_proxy.browsing_context_id(),
+                &window_proxy,
                 pipeline_id,
                 load_data,
                 replace,
@@ -2589,7 +2593,7 @@ impl Window {
                 inherited_secure_context,
             ),
             script_chan,
-            task_manager,
+            task_manager: RefCell::new(task_manager),
             layout: RefCell::new(layout),
             image_cache_chan,
             image_cache,
@@ -2646,7 +2650,21 @@ impl Window {
             current_event: DomRefCell::new(None),
         });
 
-        unsafe { WindowBinding::Wrap(JSContext::from_ptr(runtime.cx()), win) }
+        /*if let Some(reflector) = existing_window_reflector {
+            unsafe {
+                let raw = Root::new(MaybeUnreflectedDom::from_box(win));
+                let jsobject = reflector.get_jsobject();
+                let old_window: *const Window = crate::dom::bindings::conversions::native_from_object_static(jsobject.get()).unwrap();
+                set_reflector_object(jsobject, raw.as_ptr() as *const _);
+                let root = raw.reflect_with(jsobject.get());
+                let old_window_box = Box::from_raw(old_window as *mut _);
+                // create a new reflector for the replaced window object. 
+                let _ = WindowBinding::Wrap(JSContext::from_ptr(runtime.cx()), old_window_box);
+                root
+            }
+        } else {*/
+            unsafe { WindowBinding::Wrap(JSContext::from_ptr(runtime.cx()), win) }
+        //}
     }
 
     pub fn pipeline_id(&self) -> PipelineId {
@@ -2660,6 +2678,27 @@ impl Window {
     {
         LayoutValue::new(self.layout_marker.borrow().clone(), value)
     }
+
+    pub(crate) fn replace_contents(&self, data: ReplaceData) {
+        self.globalscope.replace_contents(crate::dom::globalscope::ReplaceData {
+            pipeline_id: data.pipeline_id,
+            script_to_constellation_chan: data.script_to_constellation_chan,
+            creator_url: data.creator_url,
+            origin: data.origin,
+        });
+        *self.task_manager.borrow_mut() = data.task_manager;
+        *self.layout.borrow_mut() = data.layout;
+        self.has_sent_idle_message.set(false);
+    }
+}
+
+pub(crate) struct ReplaceData {
+    pub script_to_constellation_chan: ScriptToConstellationChan,
+    pub task_manager: TaskManager,
+    pub layout: Box<dyn Layout>,
+    pub pipeline_id: PipelineId,
+    pub creator_url: ServoUrl,
+    pub origin: MutableOrigin,
 }
 
 /// An instance of a value associated with a particular snapshot of layout. This stored
@@ -2798,6 +2837,7 @@ impl Window {
             ScriptThreadEventCategory::DomEvent,
             Box::new(
                 self.task_manager
+                    .borrow()
                     .task_canceller(TaskSourceName::DOMManipulation)
                     .wrap_task(task),
             ),

components/script/dom/windowproxy.rs

@@ -298,7 +298,6 @@ impl WindowProxy {
             let new_top_level_browsing_context_id = TopLevelBrowsingContextId::new();
             let new_browsing_context_id =
                 BrowsingContextId::from(new_top_level_browsing_context_id);
-            let new_pipeline_id = PipelineId::new();
             let document = self
                 .currently_active
                 .get()
@@ -313,13 +312,15 @@ impl WindowProxy {
                 document.global().get_referrer(),
                 document.get_referrer_policy(),
                 None, // Doesn't inherit secure context
+                None,
+                true,
             );
+            let new_pipeline_id = load_data.new_pipeline_id.clone();
             let load_info = AuxiliaryBrowsingContextLoadInfo {
                 load_data: load_data.clone(),
                 opener_pipeline_id: self.currently_active.get().unwrap(),
                 new_browsing_context_id,
                 new_top_level_browsing_context_id,
-                new_pipeline_id,
             };
 
             let new_layout_info = NewLayoutInfo {
@@ -500,7 +501,7 @@ impl WindowProxy {
                 .and_then(ScriptThread::find_document)
                 .unwrap();
             // Step 14.1
-            let url = match existing_document.url().join(&url) {
+            let url = match existing_document.base_url().join(&url) {
                 Ok(url) => url,
                 Err(_) => return Err(Error::Syntax),
             };
@@ -514,6 +515,7 @@ impl WindowProxy {
             let referrer_policy = target_document.get_referrer_policy();
             let pipeline_id = target_window.upcast::<GlobalScope>().pipeline_id();
             let secure = target_window.upcast::<GlobalScope>().is_secure_context();
+            let is_about_blank = target_document.url().as_str() == "about:blank";
             let load_data = LoadData::new(
                 LoadOrigin::Script(existing_document.origin().immutable().clone()),
                 url,
@@ -521,6 +523,8 @@ impl WindowProxy {
                 referrer,
                 referrer_policy,
                 Some(secure),
+                is_about_blank.then_some(pipeline_id),
+                false,
             );
             let replacement_flag = if new {
                 HistoryEntryReplacement::Enabled

components/script/dom/xmldocument.rs

@@ -57,6 +57,7 @@ impl XMLDocument {
                 None,
                 None,
                 Default::default(),
+                false,
             ),
         }
     }

components/script/dom/xmlhttprequest.rs

@@ -1544,6 +1544,7 @@ impl XMLHttpRequest {
             None,
             Default::default(),
             can_gc,
+            false,
         )
     }
 

components/script/links.rs

@@ -20,7 +20,7 @@ use crate::dom::htmlareaelement::HTMLAreaElement;
 use crate::dom::htmlformelement::HTMLFormElement;
 use crate::dom::htmllinkelement::HTMLLinkElement;
 use crate::dom::node::document_from_node;
-use crate::dom::types::{Element, GlobalScope};
+use crate::dom::types::{Element, GlobalScope, HTMLIFrameElement};
 use crate::task_source::TaskSource;
 
 bitflags::bitflags! {
@@ -428,7 +428,17 @@ pub fn follow_hyperlink(
             referrer,
             referrer_policy,
             Some(secure),
+            (document.url().as_str() == "about:blank").then(|| document.window().pipeline_id()),
+            false,
         );
+
+        let new_pipeline_id = load_data.new_pipeline_id.clone();
+        if let Some(frame) = chosen.frame_element() {
+            if let Some(frame) = frame.downcast::<HTMLIFrameElement>() {
+                frame.update_pending_pipeline_id(new_pipeline_id);
+            }
+        }
+
         let target = Trusted::new(target_window);
         let task = task!(navigate_follow_hyperlink: move || {
             debug!("following hyperlink to {}", load_data.url);

components/script/microtask.rs

@@ -19,6 +19,7 @@ use crate::dom::bindings::codegen::Bindings::PromiseBinding::PromiseJobCallback;
 use crate::dom::bindings::codegen::Bindings::VoidFunctionBinding::VoidFunction;
 use crate::dom::bindings::root::DomRoot;
 use crate::dom::globalscope::GlobalScope;
+use crate::dom::htmliframeelement::IframeElementMicrotask;
 use crate::dom::htmlimageelement::ImageElementMicrotask;
 use crate::dom::htmlmediaelement::MediaElementMicrotask;
 use crate::dom::mutationobserver::MutationObserver;
@@ -41,6 +42,7 @@ pub enum Microtask {
     User(UserMicrotask),
     MediaElement(MediaElementMicrotask),
     ImageElement(ImageElementMicrotask),
+    IframeElement(IframeElementMicrotask),
     CustomElementReaction,
     NotifyMutationObservers,
 }
@@ -134,6 +136,10 @@ impl MicrotaskQueue {
                         let _realm = task.enter_realm();
                         task.handler(can_gc);
                     },
+                    Microtask::IframeElement(ref task) => {
+                        let _realm = task.enter_realm();
+                        task.handler(can_gc);
+                    },
                     Microtask::CustomElementReaction => {
                         ScriptThread::invoke_backup_element_queue(can_gc);
                     },

components/script/script_thread.rs

@@ -221,6 +221,9 @@ struct InProgressLoad {
     canceller: FetchCanceller,
     /// If inheriting the security context
     inherited_secure_context: Option<bool>,
+    ///
+    #[no_trace]
+    replacing_pipeline: Option<PipelineId>,
 }
 
 impl InProgressLoad {
@@ -236,6 +239,7 @@ impl InProgressLoad {
         url: ServoUrl,
         origin: MutableOrigin,
         inherited_secure_context: Option<bool>,
+        replacing_pipeline: Option<PipelineId>,
     ) -> InProgressLoad {
         let navigation_start = CrossProcessInstant::now();
         InProgressLoad {
@@ -252,6 +256,7 @@ impl InProgressLoad {
             navigation_start,
             canceller: Default::default(),
             inherited_secure_context,
+            replacing_pipeline,
         }
     }
 }
@@ -834,6 +839,7 @@ impl ScriptThreadFactory for ScriptThread {
                     load_data.url.clone(),
                     origin,
                     secure,
+                    None,
                 );
                 script_thread.pre_page_load(new_load, load_data);
 
@@ -995,7 +1001,8 @@ impl ScriptThread {
 
     /// Step 13 of <https://html.spec.whatwg.org/multipage/#navigate>
     pub fn navigate(
-        browsing_context: BrowsingContextId,
+        //browsing_context: BrowsingContextId,
+        window_proxy: &WindowProxy,
         pipeline_id: PipelineId,
         mut load_data: LoadData,
         replace: HistoryEntryReplacement,
@@ -1007,6 +1014,7 @@ impl ScriptThread {
             };
             let script_thread = unsafe { &*script_thread };
             let is_javascript = load_data.url.scheme() == "javascript";
+            let browsing_context = window_proxy.browsing_context_id();
             // If resource is a request whose url's scheme is "javascript"
             // https://html.spec.whatwg.org/multipage/#javascript-protocol
             if is_javascript {
@@ -1040,6 +1048,14 @@ impl ScriptThread {
                     ));
                 }
 
+                if let Some(frame) = window_proxy.frame_element() {
+                    if let Some(frame) = frame.downcast::<HTMLIFrameElement>() {
+                        frame.update_pending_pipeline_id(
+                            load_data.new_pipeline_id.clone(),
+                        );
+                    }
+                }
+
                 script_thread
                     .script_sender
                     .send((pipeline_id, ScriptMsg::LoadUrl(load_data, replace)))
@@ -1843,6 +1859,11 @@ impl ScriptThread {
                         ScriptThreadEventCategory::AttachLayout,
                         Some(pipeline_id),
                         || {
+                            if new_layout_info.load_data.synchronously_loaded {
+                                assert_eq!(new_layout_info.load_data.url.as_str(), "about:blank");
+                                return;
+                            }
+
                             // If this is an about:blank or about:srcdoc load, it must share the
                             // creator's origin. This must match the logic in the constellation
                             // when creating a new pipeline
@@ -2173,9 +2194,8 @@ impl ScriptThread {
                 TickAllAnimations(id, ..) => Some(id),
                 WebFontLoaded(id, ..) => Some(id),
                 DispatchIFrameLoadEvent {
-                    target: _,
                     parent: id,
-                    child: _,
+                    ..
                 } => Some(id),
                 DispatchStorageEvent(id, ..) => Some(id),
                 ReportCSSError(id, ..) => Some(id),
@@ -2380,7 +2400,8 @@ impl ScriptThread {
                 target: browsing_context_id,
                 parent: parent_id,
                 child: child_id,
-            } => self.handle_iframe_load_event(parent_id, browsing_context_id, child_id, can_gc),
+                is_initial_about_blank,
+            } => self.handle_iframe_load_event(parent_id, browsing_context_id, child_id, is_initial_about_blank, can_gc),
             ConstellationControlMsg::DispatchStorageEvent(
                 pipeline_id,
                 storage,
@@ -2919,6 +2940,7 @@ impl ScriptThread {
             load_data.url.clone(),
             origin,
             load_data.inherited_secure_context,
+            load_data.replacing_pipeline,
         );
         if load_data.url.as_str() == "about:blank" {
             self.start_page_load_about_blank(new_load, load_data.js_eval_result);
@@ -3306,8 +3328,10 @@ impl ScriptThread {
                 parser.abort(can_gc);
             }
 
-            debug!("{id}: Shutting down layout");
+            if document.is_window_relevant() {
-            document.window().layout_mut().exit_now();
+                debug!("{id}: Shutting down layout");
+                document.window().layout_mut().exit_now();
+            }
 
             debug!("{id}: Sending PipelineExited message to constellation");
             self.script_sender
@@ -3325,15 +3349,17 @@ impl ScriptThread {
                 }
             }
 
-            // We discard the browsing context after requesting layout shut down,
+            if document.is_window_relevant() {
-            // to avoid running layout on detached iframes.
+                // We discard the browsing context after requesting layout shut down,
-            let window = document.window();
+                // to avoid running layout on detached iframes.
-            if discard_bc == DiscardBrowsingContext::Yes {
+                let window = document.window();
-                window.discard_browsing_context();
+                if discard_bc == DiscardBrowsingContext::Yes {
-            }
+                    window.discard_browsing_context();
+                }
 
-            debug!("{id}: Clearing JavaScript runtime");
+                debug!("{id}: Clearing JavaScript runtime");
-            window.clear_js_runtime();
+                window.clear_js_runtime();
+            }
         }
 
         debug!("{id}: Finished pipeline exit");
@@ -3441,6 +3467,7 @@ impl ScriptThread {
         parent_id: PipelineId,
         browsing_context_id: BrowsingContextId,
         child_id: PipelineId,
+        is_initial_about_blank: bool,
         can_gc: CanGc,
     ) {
         let iframe = self
@@ -3448,7 +3475,7 @@ impl ScriptThread {
             .borrow()
             .find_iframe(parent_id, browsing_context_id);
         match iframe {
-            Some(iframe) => iframe.iframe_load_event_steps(child_id, can_gc),
+            Some(iframe) => iframe.iframe_load_event_steps(child_id, can_gc, !is_initial_about_blank),
             None => warn!("Message sent to closed pipeline {}.", parent_id),
         }
     }
@@ -3666,44 +3693,62 @@ impl ScriptThread {
         };
 
         // Create the window and document objects.
-        let window = Window::new(
+        let old_document = incomplete.replacing_pipeline.and_then(ScriptThread::find_document);
-            self.js_runtime.clone(),
+        let replacement_same_origin = old_document.as_ref().map_or(false, |doc| {
-            MainThreadScriptChan(sender.clone()),
+            let old_origin = doc.origin();
-            task_manager,
+            final_url.origin().same_origin(old_origin)
-            self.layout_factory.create(layout_config),
+        });
-            self.image_cache_channel.clone(),
+        let window = if let (Some(old_document), true) = (old_document, replacement_same_origin) {
-            self.image_cache.clone(),
+            old_document.window().replace_contents(crate::dom::window::ReplaceData {
-            self.resource_threads.clone(),
+                script_to_constellation_chan,
-            self.bluetooth_thread.clone(),
+                task_manager,
-            self.mem_profiler_chan.clone(),
+                layout: self.layout_factory.create(layout_config),
-            self.time_profiler_chan.clone(),
+                pipeline_id: incomplete.pipeline_id,
-            self.devtools_chan.clone(),
+                creator_url: final_url.clone(),
-            script_to_constellation_chan,
+                origin: origin.clone(),
-            self.control_chan.clone(),
+            });
-            self.scheduler_chan.clone(),
+            old_document.disown_window();
-            incomplete.pipeline_id,
+            DomRoot::from_ref(old_document.window())            
-            incomplete.parent_info,
+        } else {
-            incomplete.window_size,
+            Window::new(
-            origin.clone(),
+                self.js_runtime.clone(),
-            final_url.clone(),
+                MainThreadScriptChan(sender.clone()),
-            incomplete.navigation_start,
+                task_manager,
-            self.webgl_chan.as_ref().map(|chan| chan.channel()),
+                self.layout_factory.create(layout_config),
-            self.webxr_registry.clone(),
+                self.image_cache_channel.clone(),
-            self.microtask_queue.clone(),
+                self.image_cache.clone(),
-            self.webrender_document,
+                self.resource_threads.clone(),
-            self.webrender_api_sender.clone(),
+                self.bluetooth_thread.clone(),
-            self.relayout_event,
+                self.mem_profiler_chan.clone(),
-            self.prepare_for_screenshot,
+                self.time_profiler_chan.clone(),
-            self.unminify_js,
+                self.devtools_chan.clone(),
-            self.local_script_source.clone(),
+                script_to_constellation_chan,
-            self.userscripts_path.clone(),
+                self.control_chan.clone(),
-            self.headless,
+                self.scheduler_chan.clone(),
-            self.replace_surrogates,
+                incomplete.pipeline_id,
-            self.user_agent.clone(),
+                incomplete.parent_info,
-            self.player_context.clone(),
+                incomplete.window_size,
-            self.gpu_id_hub.clone(),
+                origin.clone(),
-            incomplete.inherited_secure_context,
+                final_url.clone(),
-        );
+                incomplete.navigation_start,
+                self.webgl_chan.as_ref().map(|chan| chan.channel()),
+                self.webxr_registry.clone(),
+                self.microtask_queue.clone(),
+                self.webrender_document,
+                self.webrender_api_sender.clone(),
+                self.relayout_event,
+                self.prepare_for_screenshot,
+                self.unminify_js,
+                self.local_script_source.clone(),
+                self.userscripts_path.clone(),
+                self.headless,
+                self.replace_surrogates,
+                self.user_agent.clone(),
+                self.player_context.clone(),
+                self.gpu_id_hub.clone(),
+                incomplete.inherited_secure_context,
+            )
+        };
 
         let _realm = enter_realm(&*window);
 
@@ -3715,6 +3760,7 @@ impl ScriptThread {
             incomplete.parent_info,
             incomplete.opener,
         );
+        window_proxy.set_currently_active(&window);
         if window_proxy.parent().is_some() {
             // https://html.spec.whatwg.org/multipage/#navigating-across-documents:delaying-load-events-mode-2
             // The user agent must take this nested browsing context
@@ -3785,6 +3831,7 @@ impl ScriptThread {
             Some(status_code),
             incomplete.canceller,
             can_gc,
+            final_url.as_str() == "about:blank",
         );
         document.set_ready_state(DocumentReadyState::Loading);
 

components/script/timers.rs

@@ -136,6 +136,13 @@ impl OneshotTimers {
         }
     }
 
+    pub(crate) fn reset(&self) {
+        self.js_timers.reset();
+        self.next_timer_handle.set(OneshotTimerHandle(1));
+        self.timers.borrow_mut().clear();
+        self.expected_event_id.set(TimerEventId(0));
+    }
+
     pub fn setup_scheduling(&self, timer_event_chan: IpcSender<TimerEvent>) {
         let mut chan = self.timer_event_chan.borrow_mut();
         assert!(chan.is_none());
@@ -415,6 +422,11 @@ impl Default for JsTimers {
 }
 
 impl JsTimers {
+    pub(crate) fn reset(&self) {
+        self.next_timer_handle.set(JsTimerHandle(1));
+        self.active_timers.borrow_mut().clear();
+    }
+    
     // see https://html.spec.whatwg.org/multipage/#timer-initialisation-steps
     pub fn set_timeout_or_interval(
         &self,

components/shared/script/lib.rs

@@ -128,6 +128,8 @@ pub enum LoadOrigin {
 /// parameters or headers
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct LoadData {
+    ///
+    pub new_pipeline_id: PipelineId,
     /// The origin where the load started.
     pub load_origin: LoadOrigin,
     /// The URL.
@@ -162,6 +164,11 @@ pub struct LoadData {
 
     /// Servo internal: if crash details are present, trigger a crash error page with these details.
     pub crash: Option<String>,
+
+    ///
+    pub replacing_pipeline: Option<PipelineId>,
+    ///
+    pub synchronously_loaded: bool,
 }
 
 /// The result of evaluating a javascript scheme url.
@@ -183,6 +190,8 @@ impl LoadData {
         referrer: Referrer,
         referrer_policy: Option<ReferrerPolicy>,
         inherited_secure_context: Option<bool>,
+        replacing_pipeline: Option<PipelineId>,
+        synchronously_loaded: bool,
     ) -> LoadData {
         LoadData {
             load_origin,
@@ -197,6 +206,9 @@ impl LoadData {
             srcdoc: "".to_string(),
             inherited_secure_context,
             crash: None,
+            replacing_pipeline,
+            synchronously_loaded,
+            new_pipeline_id: PipelineId::new(),
         }
     }
 }
@@ -358,6 +370,8 @@ pub enum ConstellationControlMsg {
         parent: PipelineId,
         /// The pipeline that has completed loading.
         child: PipelineId,
+        ///
+        is_initial_about_blank: bool,
     },
     /// Cause a `storage` event to be dispatched at the appropriate window.
     /// The strings are key, old value and new value.
@@ -692,8 +706,6 @@ pub struct AuxiliaryBrowsingContextLoadInfo {
     pub new_top_level_browsing_context_id: TopLevelBrowsingContextId,
     /// The new browsing context ID.
     pub new_browsing_context_id: BrowsingContextId,
-    /// The new pipeline ID for the auxiliary.
-    pub new_pipeline_id: PipelineId,
 }
 
 /// Specifies the information required to load an iframe.
@@ -705,8 +717,6 @@ pub struct IFrameLoadInfo {
     pub browsing_context_id: BrowsingContextId,
     /// The ID for the top-level ancestor browsing context of this iframe's nested browsing context.
     pub top_level_browsing_context_id: TopLevelBrowsingContextId,
-    /// The new pipeline ID that the iframe has generated.
-    pub new_pipeline_id: PipelineId,
     ///  Whether this iframe should be considered private
     pub is_private: bool,
     ///  Whether this iframe should be considered secure

components/shared/script/script_msg.rs

@@ -181,7 +181,7 @@ pub enum ScriptMsg {
     ),
     /// All pending loads are complete, and the `load` event for this pipeline
     /// has been dispatched.
-    LoadComplete,
+    LoadComplete(bool),
     /// A new load has been requested, with an option to replace the current entry once loaded
     /// instead of adding a new entry.
     LoadUrl(LoadData, HistoryEntryReplacement),
@@ -293,7 +293,7 @@ impl fmt::Debug for ScriptMsg {
             GetBrowsingContextInfo(..) => "GetBrowsingContextInfo",
             GetTopForBrowsingContext(..) => "GetParentBrowsingContext",
             GetChildBrowsingContextId(..) => "GetChildBrowsingContextId",
-            LoadComplete => "LoadComplete",
+            LoadComplete(..) => "LoadComplete",
             LoadUrl(..) => "LoadUrl",
             AbortLoadUrl => "AbortLoadUrl",
             PostMessage { .. } => "PostMessage",

components/webdriver_server/lib.rs

@@ -658,6 +658,8 @@ impl Handler {
             Referrer::NoReferrer,
             None,
             None,
+            None,
+            false,
         );
         let cmd_msg = WebDriverCommandMsg::LoadUrl(
             top_level_browsing_context_id,

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-nosrc.html.ini

@@ -1,9 +0,0 @@
-[iframe-nosrc.html]
-  [window.open]
-    expected: FAIL
-
-  [link click]
-    expected: FAIL
-
-  [form submission]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-204.html.ini

@@ -1,9 +0,0 @@
-[iframe-src-204.html]
-  [Navigating to a different document with window.open]
-    expected: FAIL
-
-  [Navigating to a different document with link click]
-    expected: FAIL
-
-  [Navigating to a different document with form submission]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini

@@ -1,9 +0,0 @@
-[iframe-src-aboutblank-navigate-immediately.html]
-  [Navigating to a different document with window.open]
-    expected: FAIL
-
-  [Navigating to a different document with link click]
-    expected: FAIL
-
-  [Navigating to a different document with form submission]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-wait-for-load.html.ini

@@ -1,18 +0,0 @@
-[iframe-src-aboutblank-wait-for-load.html]
-  [Navigating to a different document with src]
-    expected: FAIL
-
-  [Navigating to a different document with location.href]
-    expected: FAIL
-
-  [Navigating to a different document with location.assign]
-    expected: FAIL
-
-  [Navigating to a different document with window.open]
-    expected: FAIL
-
-  [Navigating to a different document with link click]
-    expected: FAIL
-
-  [Navigating to a different document with form submission]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/initial-content-replacement.html.ini

@@ -1,18 +0,0 @@
-[initial-content-replacement.html]
-  [Content synchronously added to <iframe> with src='' won't get replaced]
-    expected: FAIL
-
-  [Content synchronously added to <iframe> with src='about:blank' won't get replaced]
-    expected: FAIL
-
-  [Content synchronously added to <iframe> with src='about:blank#foo' won't get replaced]
-    expected: FAIL
-
-  [Content synchronously added to <iframe> with src='about:blank?foo' won't get replaced]
-    expected: FAIL
-
-  [Content synchronously added to window.open('about:blank')-ed document won't get replaced]
-    expected: FAIL
-
-  [Content synchronously added to window.open('about:blank?foo')-ed document won't get replaced]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-iframe-contentWindow.html.ini

@@ -1,21 +0,0 @@
-[load-pageshow-events-iframe-contentWindow.html]
-  [load & pageshow event do not fire on contentWindow of <iframe> element created with no src]
-    expected: FAIL
-  
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='']
-    expected: FAIL
-
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank?foo']
-    expected: FAIL
-
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank#foo']
-    expected: FAIL
-
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank']
-    expected: FAIL
-
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='']
-    expected: FAIL
-
-  [load & pageshow events do not fire on contentWindow of <iframe> element created with src='about:blank']
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/load-pageshow-events-window-open.html.ini

@@ -1,18 +0,0 @@
-[load-pageshow-events-window-open.html]
-  [load event does not fire on window.open()]
-    expected: FAIL
-
-  [load event does not fire on window.open('about:blank')]
-    expected: FAIL
-
-  [load event does not fire on window.open('')]
-    expected: FAIL
-
-  [load event does not fire on window.open('about:blank#foo')]
-    expected: FAIL
-
-  [load event does not fire on window.open('about:blank?foo')]
-    expected: FAIL
-
-  [load event does not fire on window.open('about:blank')]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-aboutblank.html.ini

@@ -1,6 +0,0 @@
-[window-open-aboutblank.html]
-  [location.href]
-    expected: FAIL
-
-  [location.assign]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/window-open-nourl.html.ini

@@ -1,6 +0,0 @@
-[window-open-nourl.html]
-  [location.href]
-    expected: FAIL
-
-  [location.assign]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-load-as-html.xhtml.ini

@@ -1,4 +0,0 @@
-[javascript-url-load-as-html.xhtml]
-  expected: TIMEOUT
-  [javascript: URL navigation to a string must create a HTML document using the correct properties]
-    expected: TIMEOUT

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-no-beforeunload.window.js.ini

@@ -1,10 +0,0 @@
-[javascript-url-no-beforeunload.window.html]
-  expected: TIMEOUT
-  [Navigating an opened window with an iframe via location.href to a javascript: URL must not fire beforeunload on the iframe: string completion]
-    expected: NOTRUN
-
-  [Navigating an opened window via location.href to a javascript: URL must not fire beforeunload: string completion]
-    expected: TIMEOUT
-
-  [Navigating an opened window with an iframe via location.href to a javascript: URL must not fire beforeunload on the iframe: undefined completion]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-referrer.window.js.ini

@@ -1,10 +0,0 @@
-[javascript-url-referrer.window.html]
-  expected: TIMEOUT
-  [unsafe-url referrer policy used to create the starting page]
-    expected: FAIL
-
-  [origin referrer policy used to create the starting page]
-    expected: FAIL
-
-  [no-referrer referrer policy used to create the starting page]
-    expected: TIMEOUT

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/navigate-to-unparseable-url.html.ini

@@ -1,6 +0,0 @@
-[navigate-to-unparseable-url.html]
-  [location.href setter throws a SyntaxError DOMException for unparseable URLs]
-    expected: FAIL
-
-  [<a> tag navigate fails for unparseable URLs]
-    expected: FAIL

tests/wpt/meta/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini

@@ -1,3 +0,0 @@
-[a-click.html]
-  [aElement.click() before the load event must NOT replace]
-    expected: FAIL

tests/wpt/mozilla/meta/MANIFEST.json

@@ -10414,7 +10414,7 @@
      ],
      "resource": {
       "file-submission.py": [
-       "5f65cebd05ce89b3a51c2382a39b6a6438133b43",
+       "b03a4c9a5ddebc78af2bf8d0a35ebaca27bb4314",
        []
       ],
       "upload.txt": [
@@ -13227,7 +13227,7 @@
      ]
     ],
     "form_submit_about.html": [
-     "ec572ab0bc608c8cf5dd43f4159d3a67fc31a0de",
+     "71342b9b6b3ae6f037829b2e472bdd2fd1e93692",
      [
       null,
       {}

tests/wpt/mozilla/tests/mozilla/FileAPI/resource/file-submission.py

@@ -6,17 +6,17 @@
 
 
 def fail(msg):
-    return ([("Content-Type", "text/plain")], "FAIL: " + msg)
+    return ([("Content-Type", "text/plain")], b"FAIL: " + msg)
 
 
 def main(request, response):
     content_type = request.headers.get(b'Content-Type').split(b"; ")
 
     if len(content_type) != 2:
-        return fail("content type length is incorrect")
+        return fail(b"content type length is incorrect")
 
     if content_type[0] != b'multipart/form-data':
-        return fail("content type first field is incorrect")
+        return fail(b"content type first field is incorrect")
 
     boundary = content_type[1].strip(b"boundary=")
 
@@ -24,6 +24,6 @@ def main(request, response):
     body += b"\r\n" + b"content-type: text/plain\r\n\r\nHello\r\n--" + boundary + b"--\r\n"
 
     if body != request.body:
-        return fail("request body doesn't match: " + body + "+++++++" + request.body)
+        return fail(b"request body doesn't match: " + body + b"+++++++" + request.body)
 
     return ([("Content-Type", "text/plain")], "OK")

tests/wpt/mozilla/tests/mozilla/form_submit_about.html

@@ -9,7 +9,7 @@
             var numOnLoads = 0
             var t = async_test("about:blank as form target")
             var iframe = document.getElementById('foo')
-            iframe.onload = t.step_func(function(e) { if (++numOnLoads == 2) t.done() })
+            iframe.onload = t.step_func(function(e) { t.step_timeout(() => t.done(), 100); iframe.onload = t.unreached_func(); })
         </script>
     </body>
 </html>