diff --git a/servo/components/script/dom/bindings/str.rs b/servo/components/script/dom/bindings/str.rs
index 896c2af5b241..d5b10fcb01e1 100644
--- a/servo/components/script/dom/bindings/str.rs
+++ b/servo/components/script/dom/bindings/str.rs
@@ -170,11 +170,16 @@ impl DOMString {
         self.0.push_str(string)
     }
 
-    /// Truncates this `DOMString`, removing all contents.
+    /// Clears this `DOMString`, removing all contents.
     pub fn clear(&mut self) {
         self.0.clear()
     }
 
+    /// Shortens this String to the specified length.
+    pub fn truncate(&mut self, new_len: usize) {
+        self.0.truncate(new_len);
+    }
+
     /// An iterator over the bytes of this `DOMString`.
     pub fn bytes(&self) -> Bytes {
         self.0.bytes()
diff --git a/servo/components/script/dom/document.rs b/servo/components/script/dom/document.rs
index b2e93325236f..722e0283d1ee 100644
--- a/servo/components/script/dom/document.rs
+++ b/servo/components/script/dom/document.rs
@@ -16,6 +16,7 @@ use dom::bindings::codegen::Bindings::DocumentBinding::{DocumentMethods, Documen
 use dom::bindings::codegen::Bindings::ElementBinding::ElementMethods;
 use dom::bindings::codegen::Bindings::EventHandlerBinding::EventHandlerNonNull;
 use dom::bindings::codegen::Bindings::EventHandlerBinding::OnErrorEventHandlerNonNull;
+use dom::bindings::codegen::Bindings::HTMLIFrameElementBinding::HTMLIFrameElementBinding::HTMLIFrameElementMethods;
 use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
 use dom::bindings::codegen::Bindings::NodeFilterBinding::NodeFilter;
 use dom::bindings::codegen::Bindings::PerformanceBinding::PerformanceMethods;
@@ -131,7 +132,7 @@ use style::attr::AttrValue;
 use style::context::{QuirksMode, ReflowGoal};
 use style::restyle_hints::{RestyleHint, RESTYLE_STYLE_ATTRIBUTE};
 use style::selector_parser::{RestyleDamage, Snapshot};
-use style::str::{split_html_space_chars, str_join};
+use style::str::{HTML_SPACE_CHARACTERS, split_html_space_chars, str_join};
 use style::stylesheets::Stylesheet;
 use task_source::TaskSource;
 use time;
@@ -1756,6 +1757,37 @@ impl Document {
         // TODO: client message queue.
     }
 
+    // https://html.spec.whatwg.org/multipage/#abort-a-document
+    fn abort(&self) {
+        // We need to inhibit the loader before anything else.
+        self.loader.borrow_mut().inhibit_events();
+
+        // Step 1.
+        for iframe in self.iter_iframes() {
+            if let Some(document) = iframe.GetContentDocument() {
+                // TODO: abort the active documents of every child browsing context.
+                document.abort();
+                // TODO: salvageable flag.
+            }
+        }
+
+        // Step 2.
+        self.script_blocking_stylesheets_count.set(0);
+        *self.pending_parsing_blocking_script.borrow_mut() = None;
+        *self.asap_scripts_set.borrow_mut() = vec![];
+        self.asap_in_order_scripts_list.clear();
+        self.deferred_scripts.clear();
+
+        // TODO: https://github.com/servo/servo/issues/15236
+        self.window.cancel_all_tasks();
+
+        // Step 3.
+        if let Some(parser) = self.get_current_parser() {
+            parser.abort();
+            // TODO: salvageable flag.
+        }
+    }
+
     pub fn notify_constellation_load(&self) {
         let global_scope = self.window.upcast::<GlobalScope>();
         let pipeline_id = global_scope.pipeline_id();
@@ -3280,6 +3312,149 @@ impl DocumentMethods for Document {
         elements
     }
 
+    // https://html.spec.whatwg.org/multipage/#dom-document-open
+    fn Open(&self, type_: DOMString, replace: DOMString) -> Fallible<Root<Document>> {
+        if !self.is_html_document() {
+            // Step 1.
+            return Err(Error::InvalidState);
+        }
+
+        // Step 2.
+        // TODO: handle throw-on-dynamic-markup-insertion counter.
+
+        if !self.is_active() {
+            // Step 3.
+            return Ok(Root::from_ref(self));
+        }
+
+        let entry_responsible_document = GlobalScope::entry().as_window().Document();
+
+        if !self.origin.same_origin(&entry_responsible_document.origin) {
+            // Step 4.
+            return Err(Error::Security);
+        }
+
+        if self.get_current_parser().map_or(false, |parser| parser.script_nesting_level() > 0) {
+            // Step 5.
+            return Ok(Root::from_ref(self));
+        }
+
+        // Step 6.
+        // TODO: ignore-opens-during-unload counter check.
+
+        // Step 7: first argument already bound to `type_`.
+
+        // Step 8.
+        // TODO: check session history's state.
+        let replace = replace.eq_ignore_ascii_case("replace");
+
+        // Step 9.
+        // TODO: salvageable flag.
+
+        // Step 10.
+        // TODO: prompt to unload.
+
+        // Step 11.
+        // TODO: unload.
+
+        // Step 12.
+        self.abort();
+
+        // Step 13.
+        for node in self.upcast::<Node>().traverse_preorder() {
+            node.upcast::<EventTarget>().remove_all_listeners();
+        }
+
+        // Step 14.
+        // TODO: remove any tasks associated with the Document in any task source.
+
+        // Step 15.
+        Node::replace_all(None, self.upcast::<Node>());
+
+        // Steps 16-18.
+        // Let's not?
+        // TODO: https://github.com/whatwg/html/issues/1698
+
+        // Step 19.
+        self.implementation.set(None);
+        self.location.set(None);
+        self.images.set(None);
+        self.embeds.set(None);
+        self.links.set(None);
+        self.forms.set(None);
+        self.scripts.set(None);
+        self.anchors.set(None);
+        self.applets.set(None);
+        *self.stylesheets.borrow_mut() = None;
+        self.stylesheets_changed_since_reflow.set(true);
+        self.animation_frame_ident.set(0);
+        self.animation_frame_list.borrow_mut().clear();
+        self.pending_restyles.borrow_mut().clear();
+        self.target_element.set(None);
+        *self.last_click_info.borrow_mut() = None;
+
+        // Step 20.
+        self.set_encoding(UTF_8);
+
+        // Step 21.
+        // TODO: reload override buffer.
+
+        // Step 22.
+        // TODO: salvageable flag.
+
+        let url = entry_responsible_document.url();
+
+        // Step 23.
+        self.set_url(url.clone());
+
+        // Step 24.
+        // TODO: mute iframe load.
+
+        // Step 27.
+        let type_ = if type_.eq_ignore_ascii_case("replace") {
+            "text/html"
+        } else if let Some(position) = type_.find(';') {
+            &type_[0..position]
+        } else {
+            &*type_
+        };
+        let type_ = type_.trim_matches(HTML_SPACE_CHARACTERS);
+
+        // Step 25.
+        let resource_threads =
+            self.window.upcast::<GlobalScope>().resource_threads().clone();
+        *self.loader.borrow_mut() =
+            DocumentLoader::new_with_threads(resource_threads, Some(url.clone()));
+        ServoParser::parse_html_script_input(self, url, type_);
+
+        // Step 26.
+        self.ready_state.set(DocumentReadyState::Interactive);
+
+        // Step 28 is handled when creating the parser in step 25.
+
+        // Step 29.
+        // TODO: truncate session history.
+
+        // Step 30.
+        // TODO: remove history traversal tasks.
+
+        // Step 31.
+        // TODO: remove earlier entries.
+
+        if !replace {
+            // Step 32.
+            // TODO: add history entry.
+        }
+
+        // Step 33.
+        // TODO: clear fired unload flag.
+
+        // Step 34 is handled when creating the parser in step 25.
+
+        // Step 35.
+        Ok(Root::from_ref(self))
+    }
+
     // https://html.spec.whatwg.org/multipage/#dom-document-write
     fn Write(&self, text: Vec<DOMString>) -> ErrorResult {
         if !self.is_html_document() {
@@ -3294,9 +3469,8 @@ impl DocumentMethods for Document {
             return Ok(());
         }
 
-        let parser = self.get_current_parser();
-        let parser = match parser.as_ref() {
-            Some(parser) if parser.script_nesting_level() > 0 => parser,
+        let parser = match self.get_current_parser() {
+            Some(ref parser) if parser.can_write() => Root::from_ref(&**parser),
             _ => {
                 // Either there is no parser, which means the parsing ended;
                 // or script nesting level is 0, which means the method was
@@ -3307,8 +3481,8 @@ impl DocumentMethods for Document {
                     return Ok(());
                 }
                 // Step 5.
-                // TODO: call document.open().
-                return Err(Error::InvalidState);
+                self.Open("text/html".into(), "".into())?;
+                self.get_current_parser().unwrap()
             }
         };
 
@@ -3328,6 +3502,30 @@ impl DocumentMethods for Document {
         self.Write(text)
     }
 
+    // https://html.spec.whatwg.org/multipage/#dom-document-close
+    fn Close(&self) -> ErrorResult {
+        if !self.is_html_document() {
+            // Step 1.
+            return Err(Error::InvalidState);
+        }
+
+        // Step 2.
+        // TODO: handle throw-on-dynamic-markup-insertion counter.
+
+        let parser = match self.get_current_parser() {
+            Some(ref parser) if parser.is_script_created() => Root::from_ref(&**parser),
+            _ => {
+                // Step 3.
+                return Ok(());
+            }
+        };
+
+        // Step 4-6.
+        parser.close();
+
+        Ok(())
+    }
+
     // https://html.spec.whatwg.org/multipage/#documentandelementeventhandlers
     document_and_element_event_handlers!();
 
@@ -3496,6 +3694,7 @@ impl PendingInOrderScriptVec {
     fn is_empty(&self) -> bool {
         self.scripts.borrow().is_empty()
     }
+
     fn push(&self, element: &HTMLScriptElement) {
         self.scripts.borrow_mut().push_back(PendingScript::new(element));
     }
@@ -3515,6 +3714,10 @@ impl PendingInOrderScriptVec {
         scripts.pop_front();
         pair
     }
+
+    fn clear(&self) {
+        *self.scripts.borrow_mut() = Default::default();
+    }
 }
 
 #[derive(HeapSizeOf, JSTraceable)]
diff --git a/servo/components/script/dom/eventtarget.rs b/servo/components/script/dom/eventtarget.rs
index 15790d7ce53b..1e1a52830a6f 100644
--- a/servo/components/script/dom/eventtarget.rs
+++ b/servo/components/script/dom/eventtarget.rs
@@ -306,6 +306,10 @@ impl EventTarget {
         event.dispatch(self, None)
     }
 
+    pub fn remove_all_listeners(&self) {
+        *self.handlers.borrow_mut() = Default::default();
+    }
+
     /// https://html.spec.whatwg.org/multipage/#event-handler-attributes:event-handlers-11
     fn set_inline_event_listener(&self,
                                  ty: Atom,
diff --git a/servo/components/script/dom/servoparser/mod.rs b/servo/components/script/dom/servoparser/mod.rs
index 7117f7d45f75..39077930200b 100644
--- a/servo/components/script/dom/servoparser/mod.rs
+++ b/servo/components/script/dom/servoparser/mod.rs
@@ -38,6 +38,7 @@ use script_thread::ScriptThread;
 use script_traits::DocumentActivity;
 use servo_config::resource_files::read_resource_file;
 use servo_url::ServoUrl;
+use std::ascii::AsciiExt;
 use std::cell::Cell;
 use std::mem;
 
@@ -75,6 +76,10 @@ pub struct ServoParser {
     suspended: Cell<bool>,
     /// https://html.spec.whatwg.org/multipage/#script-nesting-level
     script_nesting_level: Cell<usize>,
+    /// https://html.spec.whatwg.org/multipage/#abort-a-parser
+    aborted: Cell<bool>,
+    /// https://html.spec.whatwg.org/multipage/#script-created-parser
+    script_created_parser: bool,
 }
 
 #[derive(PartialEq)]
@@ -87,7 +92,8 @@ impl ServoParser {
     pub fn parse_html_document(document: &Document, input: DOMString, url: ServoUrl) {
         let parser = ServoParser::new(document,
                                       Tokenizer::Html(self::html::Tokenizer::new(document, url, None)),
-                                      LastChunkState::NotReceived);
+                                      LastChunkState::NotReceived,
+                                      ParserKind::Normal);
         parser.parse_chunk(String::from(input));
     }
 
@@ -129,7 +135,8 @@ impl ServoParser {
                                       Tokenizer::Html(self::html::Tokenizer::new(&document,
                                                                                  url.clone(),
                                                                                  Some(fragment_context))),
-                                      LastChunkState::Received);
+                                      LastChunkState::Received,
+                                      ParserKind::Normal);
         parser.parse_chunk(String::from(input));
 
         // Step 14.
@@ -139,10 +146,23 @@ impl ServoParser {
         }
     }
 
+    pub fn parse_html_script_input(document: &Document, url: ServoUrl, type_: &str) {
+        let parser = ServoParser::new(document,
+                                      Tokenizer::Html(self::html::Tokenizer::new(document, url, None)),
+                                      LastChunkState::NotReceived,
+                                      ParserKind::ScriptCreated);
+        document.set_current_parser(Some(&parser));
+        if !type_.eq_ignore_ascii_case("text/html") {
+            parser.parse_chunk("<pre>\n".to_owned());
+            parser.tokenizer.borrow_mut().set_plaintext_state();
+        }
+    }
+
     pub fn parse_xml_document(document: &Document, input: DOMString, url: ServoUrl) {
         let parser = ServoParser::new(document,
                                       Tokenizer::Xml(self::xml::Tokenizer::new(document, url)),
-                                      LastChunkState::NotReceived);
+                                      LastChunkState::NotReceived,
+                                      ParserKind::Normal);
         parser.parse_chunk(String::from(input));
     }
 
@@ -150,6 +170,10 @@ impl ServoParser {
         self.script_nesting_level.get()
     }
 
+    pub fn is_script_created(&self) -> bool {
+        self.script_created_parser
+    }
+
     /// Corresponds to the latter part of the "Otherwise" branch of the 'An end
     /// tag whose tag name is "script"' of
     /// https://html.spec.whatwg.org/multipage/#parsing-main-incdata
@@ -186,9 +210,13 @@ impl ServoParser {
         }
     }
 
+    pub fn can_write(&self) -> bool {
+        self.script_created_parser || self.script_nesting_level.get() > 0
+    }
+
     /// Steps 6-8 of https://html.spec.whatwg.org/multipage/#document.write()
     pub fn write(&self, text: Vec<DOMString>) {
-        assert!(self.script_nesting_level.get() > 0);
+        assert!(self.can_write());
 
         if self.document.has_pending_parsing_blocking_script() {
             // There is already a pending parsing blocking script so the
@@ -225,10 +253,47 @@ impl ServoParser {
         assert!(input.is_empty());
     }
 
+    // Steps 4-6 of https://html.spec.whatwg.org/multipage/#dom-document-close
+    pub fn close(&self) {
+        assert!(self.script_created_parser);
+
+        // Step 4.
+        self.last_chunk_received.set(true);
+
+        if self.suspended.get() {
+            // Step 5.
+            return;
+        }
+
+        // Step 6.
+        self.parse_sync();
+    }
+
+    // https://html.spec.whatwg.org/multipage/#abort-a-parser
+    pub fn abort(&self) {
+        assert!(!self.aborted.get());
+        self.aborted.set(true);
+
+        // Step 1.
+        *self.script_input.borrow_mut() = BufferQueue::new();
+        *self.network_input.borrow_mut() = BufferQueue::new();
+
+        // Step 2.
+        self.document.set_ready_state(DocumentReadyState::Interactive);
+
+        // Step 3.
+        self.tokenizer.borrow_mut().end();
+        self.document.set_current_parser(None);
+
+        // Step 4.
+        self.document.set_ready_state(DocumentReadyState::Interactive);
+    }
+
     #[allow(unrooted_must_root)]
     fn new_inherited(document: &Document,
                      tokenizer: Tokenizer,
-                     last_chunk_state: LastChunkState)
+                     last_chunk_state: LastChunkState,
+                     kind: ParserKind)
                      -> Self {
         ServoParser {
             reflector: Reflector::new(),
@@ -239,15 +304,18 @@ impl ServoParser {
             last_chunk_received: Cell::new(last_chunk_state == LastChunkState::Received),
             suspended: Default::default(),
             script_nesting_level: Default::default(),
+            aborted: Default::default(),
+            script_created_parser: kind == ParserKind::ScriptCreated,
         }
     }
 
     #[allow(unrooted_must_root)]
     fn new(document: &Document,
            tokenizer: Tokenizer,
-           last_chunk_state: LastChunkState)
+           last_chunk_state: LastChunkState,
+           kind: ParserKind)
            -> Root<Self> {
-        reflect_dom_object(box ServoParser::new_inherited(document, tokenizer, last_chunk_state),
+        reflect_dom_object(box ServoParser::new_inherited(document, tokenizer, last_chunk_state, kind),
                            document.window(),
                            ServoParserBinding::Wrap)
     }
@@ -301,6 +369,7 @@ impl ServoParser {
     {
         loop {
             assert!(!self.suspended.get());
+            assert!(!self.aborted.get());
 
             self.document.reflow_if_reflow_timer_expired();
             let script = match feed(&mut *self.tokenizer.borrow_mut()) {
@@ -358,6 +427,12 @@ impl Iterator for FragmentParsingResult {
     }
 }
 
+#[derive(HeapSizeOf, JSTraceable, PartialEq)]
+enum ParserKind {
+    Normal,
+    ScriptCreated,
+}
+
 #[derive(HeapSizeOf, JSTraceable)]
 #[must_root]
 enum Tokenizer {
@@ -462,6 +537,9 @@ impl FetchResponseListener for ParserContext {
             Some(parser) => parser,
             None => return,
         };
+        if parser.aborted.get() {
+            return;
+        }
 
         self.parser = Some(Trusted::new(&*parser));
 
@@ -528,15 +606,19 @@ impl FetchResponseListener for ParserContext {
     }
 
     fn process_response_chunk(&mut self, payload: Vec<u8>) {
-        if !self.is_synthesized_document {
-            // FIXME: use Vec<u8> (html5ever #34)
-            let data = UTF_8.decode(&payload, DecoderTrap::Replace).unwrap();
-            let parser = match self.parser.as_ref() {
-                Some(parser) => parser.root(),
-                None => return,
-            };
-            parser.parse_chunk(data);
+        if self.is_synthesized_document {
+            return;
         }
+        // FIXME: use Vec<u8> (html5ever #34)
+        let data = UTF_8.decode(&payload, DecoderTrap::Replace).unwrap();
+        let parser = match self.parser.as_ref() {
+            Some(parser) => parser.root(),
+            None => return,
+        };
+        if parser.aborted.get() {
+            return;
+        }
+        parser.parse_chunk(data);
     }
 
     fn process_response_eof(&mut self, status: Result<(), NetworkError>) {
@@ -544,6 +626,9 @@ impl FetchResponseListener for ParserContext {
             Some(parser) => parser.root(),
             None => return,
         };
+        if parser.aborted.get() {
+            return;
+        }
 
         if let Err(err) = status {
             // TODO(Savago): we should send a notification to callers #5463.
diff --git a/servo/components/script/dom/webidls/Document.webidl b/servo/components/script/dom/webidls/Document.webidl
index 4955bf6e9561..46e5ce05abf2 100644
--- a/servo/components/script/dom/webidls/Document.webidl
+++ b/servo/components/script/dom/webidls/Document.webidl
@@ -111,9 +111,11 @@ partial /*sealed*/ interface Document {
   readonly attribute HTMLScriptElement? currentScript;
 
   // dynamic markup insertion
-  // Document open(optional DOMString type = "text/html", optional DOMString replace = "");
+  [Throws]
+  Document open(optional DOMString type = "text/html", optional DOMString replace = "");
   // WindowProxy open(DOMString url, DOMString name, DOMString features, optional boolean replace = false);
-  // void close();
+  [Throws]
+  void close();
   [Throws]
   void write(DOMString... text);
   [Throws]
diff --git a/servo/components/script/dom/window.rs b/servo/components/script/dom/window.rs
index 86957d943d94..f1834de260d8 100644
--- a/servo/components/script/dom/window.rs
+++ b/servo/components/script/dom/window.rs
@@ -60,8 +60,8 @@ use net_traits::storage_thread::StorageType;
 use num_traits::ToPrimitive;
 use open;
 use origin::Origin;
-use profile_traits::mem;
-use profile_traits::time::ProfilerChan;
+use profile_traits::mem::ProfilerChan as MemProfilerChan;
+use profile_traits::time::ProfilerChan as TimeProfilerChan;
 use rustc_serialize::base64::{FromBase64, STANDARD, ToBase64};
 use script_layout_interface::TrustedNodeAddress;
 use script_layout_interface::message::{Msg, Reflow, ReflowQueryType, ScriptReflow};
@@ -87,6 +87,7 @@ use std::cell::Cell;
 use std::collections::{HashMap, HashSet};
 use std::default::Default;
 use std::io::{Write, stderr, stdout};
+use std::mem;
 use std::rc::Rc;
 use std::sync::{Arc, Mutex};
 use std::sync::atomic::{AtomicBool, Ordering};
@@ -231,7 +232,7 @@ pub struct Window {
 
     /// A flag to prevent async events from attempting to interact with this window.
     #[ignore_heap_size_of = "defined in std"]
-    ignore_further_async_events: Arc<AtomicBool>,
+    ignore_further_async_events: DOMRefCell<Arc<AtomicBool>>,
 
     error_reporter: CSSErrorReporter,
 
@@ -255,7 +256,7 @@ impl Window {
             *self.js_runtime.borrow_for_script_deallocation() = None;
             self.browsing_context.set(None);
             self.current_state.set(WindowState::Zombie);
-            self.ignore_further_async_events.store(true, Ordering::Relaxed);
+            self.ignore_further_async_events.borrow().store(true, Ordering::Relaxed);
         }
     }
 
@@ -917,10 +918,19 @@ impl WindowMethods for Window {
 impl Window {
     pub fn get_runnable_wrapper(&self) -> RunnableWrapper {
         RunnableWrapper {
-            cancelled: Some(self.ignore_further_async_events.clone()),
+            cancelled: Some(self.ignore_further_async_events.borrow().clone()),
         }
     }
 
+    /// Cancels all the tasks associated with that window.
+    ///
+    /// This sets the current `ignore_further_async_events` sentinel value to
+    /// `true` and replaces it with a brand new one for future tasks.
+    pub fn cancel_all_tasks(&self) {
+        let cancelled = mem::replace(&mut *self.ignore_further_async_events.borrow_mut(), Default::default());
+        cancelled.store(true, Ordering::Relaxed);
+    }
+
     pub fn clear_js_runtime(&self) {
         // We tear down the active document, which causes all the attached
         // nodes to dispose of their layout data. This messages the layout
@@ -944,7 +954,7 @@ impl Window {
         self.current_state.set(WindowState::Zombie);
         *self.js_runtime.borrow_mut() = None;
         self.browsing_context.set(None);
-        self.ignore_further_async_events.store(true, Ordering::SeqCst);
+        self.ignore_further_async_events.borrow().store(true, Ordering::SeqCst);
     }
 
     /// https://drafts.csswg.org/cssom-view/#dom-window-scroll
@@ -1611,8 +1621,8 @@ impl Window {
                image_cache_thread: ImageCacheThread,
                resource_threads: ResourceThreads,
                bluetooth_thread: IpcSender<BluetoothRequest>,
-               mem_profiler_chan: mem::ProfilerChan,
-               time_profiler_chan: ProfilerChan,
+               mem_profiler_chan: MemProfilerChan,
+               time_profiler_chan: TimeProfilerChan,
                devtools_chan: Option<IpcSender<ScriptToDevtoolsControlMsg>>,
                constellation_chan: IpcSender<ConstellationMsg>,
                control_chan: IpcSender<ConstellationControlMsg>,
@@ -1681,7 +1691,7 @@ impl Window {
             devtools_marker_sender: DOMRefCell::new(None),
             devtools_markers: DOMRefCell::new(HashSet::new()),
             webdriver_script_chan: DOMRefCell::new(None),
-            ignore_further_async_events: Arc::new(AtomicBool::new(false)),
+            ignore_further_async_events: Default::default(),
             error_reporter: error_reporter,
             scroll_offsets: DOMRefCell::new(HashMap::new()),
             media_query_lists: WeakMediaQueryListVec::new(),