diff --git a/components/script/dom/bindings/codegen/CodegenRust.py b/components/script/dom/bindings/codegen/CodegenRust.py
index 2e511e342e9..b828ccb74bd 100644
--- a/components/script/dom/bindings/codegen/CodegenRust.py
+++ b/components/script/dom/bindings/codegen/CodegenRust.py
@@ -1040,7 +1040,7 @@ class CGArgumentConverter(CGThing):
         else:
             assert argument.optional
             variadicConversion = {
-                "val": string.Template("(*${argv}.offset(variadicArg as int))").substitute(replacer),
+                "val": string.Template("(*${argv}.offset(variadicArg as isize))").substitute(replacer),
             }
             innerConverter = instantiateJSToNativeConversionTemplate(
                 template, variadicConversion, declType, "slot",
diff --git a/components/script/dom/bindings/trace.rs b/components/script/dom/bindings/trace.rs
index 0dbe3bd4c78..5f726ac5d1a 100644
--- a/components/script/dom/bindings/trace.rs
+++ b/components/script/dom/bindings/trace.rs
@@ -321,7 +321,7 @@ impl RootedCollectionSet {
         ROOTED_COLLECTIONS.with(|ref collections| {
             let type_ = VecRootableType::tag(None::<T>);
             let mut collections = collections.borrow_mut();
-            assert!(collections.set[type_ as uint].remove(&(collection as *const _ as *const _)));
+            assert!(collections.set[type_ as usize].remove(&(collection as *const _ as *const _)));
         });
     }
 
@@ -329,7 +329,7 @@ impl RootedCollectionSet {
         ROOTED_COLLECTIONS.with(|ref collections| {
             let type_ = VecRootableType::tag(None::<T>);
             let mut collections = collections.borrow_mut();
-            collections.set[type_ as uint].insert(collection as *const _ as *const _);
+            collections.set[type_ as usize].insert(collection as *const _ as *const _);
         })
     }
 
@@ -345,15 +345,15 @@ impl RootedCollectionSet {
             }
         }
 
-        let dom_collections = &self.set[CollectionType::DOMObjects as uint] as *const _ as *const HashSet<*const RootedVec<*const Reflector>>;
+        let dom_collections = &self.set[CollectionType::DOMObjects as usize] as *const _ as *const HashSet<*const RootedVec<*const Reflector>>;
         for dom_collection in (*dom_collections).iter() {
             for reflector in (**dom_collection).iter() {
                 trace_reflector(tracer, "", &**reflector);
             }
         }
 
-        trace_collection_type::<JSVal>(tracer, &self.set[CollectionType::JSVals as uint]);
-        trace_collection_type::<*mut JSObject>(tracer, &self.set[CollectionType::JSObjects as uint]);
+        trace_collection_type::<JSVal>(tracer, &self.set[CollectionType::JSVals as usize]);
+        trace_collection_type::<*mut JSObject>(tracer, &self.set[CollectionType::JSObjects as usize]);
     }
 }
 
diff --git a/components/script/dom/browsercontext.rs b/components/script/dom/browsercontext.rs
index d7e3eb90500..328182e2942 100644
--- a/components/script/dom/browsercontext.rs
+++ b/components/script/dom/browsercontext.rs
@@ -32,7 +32,7 @@ use std::ptr;
 #[privatize]
 pub struct BrowserContext {
     history: Vec<SessionHistoryEntry>,
-    active_index: uint,
+    active_index: usize,
     window_proxy: *mut JSObject,
     frame_element: Option<JS<Element>>,
 }
diff --git a/components/script/dom/document.rs b/components/script/dom/document.rs
index ca3f7539501..0fc20157eb0 100644
--- a/components/script/dom/document.rs
+++ b/components/script/dom/document.rs
@@ -339,7 +339,7 @@ impl<'a> DocumentHelpers<'a> for JSRef<'a, Document> {
                 let elements = entry.into_mut();
 
                 let new_node: JSRef<Node> = NodeCast::from_ref(element);
-                let mut head: uint = 0u;
+                let mut head: usize = 0;
                 let root: JSRef<Node> = NodeCast::from_ref(root.r());
                 for node in root.traverse_preorder() {
                     let elem: Option<JSRef<Element>> = ElementCast::to_ref(node);
diff --git a/components/script/dom/imagedata.rs b/components/script/dom/imagedata.rs
index c9da863096c..4b1bccab86c 100644
--- a/components/script/dom/imagedata.rs
+++ b/components/script/dom/imagedata.rs
@@ -63,7 +63,7 @@ impl<'a> ImageDataHelpers for JSRef<'a, ImageData> {
             let cx = global.get_cx();
             let data: *const uint8_t = JS_GetUint8ClampedArrayData(self.Data(cx), cx) as *const uint8_t;
             let len = self.Width() * self.Height() * 4;
-            slice::from_raw_parts(data, len as uint).to_vec()
+            slice::from_raw_parts(data, len as usize).to_vec()
         }
     }
 
diff --git a/components/script/dom/namednodemap.rs b/components/script/dom/namednodemap.rs
index 6b6bf0e64cd..bfa8f1652f1 100644
--- a/components/script/dom/namednodemap.rs
+++ b/components/script/dom/namednodemap.rs
@@ -45,7 +45,7 @@ impl<'a> NamedNodeMapMethods for JSRef<'a, NamedNodeMap> {
         // FIXME(https://github.com/rust-lang/rust/issues/23338)
         let owner = owner.r();
         let attrs = owner.attrs();
-        attrs.as_slice().get(index as uint).map(|x| Temporary::new(x.clone()))
+        attrs.as_slice().get(index as usize).map(|x| Temporary::new(x.clone()))
     }
 
     fn IndexedGetter(self, index: u32, found: &mut bool) -> Option<Temporary<Attr>> {
diff --git a/components/script/dom/node.rs b/components/script/dom/node.rs
index c8977440c43..a302308d33a 100644
--- a/components/script/dom/node.rs
+++ b/components/script/dom/node.rs
@@ -475,7 +475,7 @@ pub trait NodeHelpers<'a> {
     fn dirty_impl(self, damage: NodeDamage, force_ancestors: bool);
 
     fn dump(self);
-    fn dump_indent(self, indent: uint);
+    fn dump_indent(self, indent: u32);
     fn debug_str(self) -> String;
 
     fn traverse_preorder(self) -> TreeIterator<'a>;
@@ -514,9 +514,9 @@ impl<'a> NodeHelpers<'a> for JSRef<'a, Node> {
     }
 
     /// Dumps the node tree, for debugging, with indentation.
-    fn dump_indent(self, indent: uint) {
+    fn dump_indent(self, indent: u32) {
         let mut s = String::new();
-        for _ in range(0, indent) {
+        for _ in 0..indent {
             s.push_str("    ");
         }
 
@@ -526,7 +526,7 @@ impl<'a> NodeHelpers<'a> for JSRef<'a, Node> {
         // FIXME: this should have a pure version?
         for kid in self.children() {
             let kid = kid.root();
-            kid.r().dump_indent(indent + 1u)
+            kid.r().dump_indent(indent + 1)
         }
     }
 
@@ -886,10 +886,10 @@ impl<'a> NodeHelpers<'a> for JSRef<'a, Node> {
             uniqueId: unique_id.clone(),
             baseURI: self.GetBaseURI().unwrap_or("".to_owned()),
             parent: self.GetParentNode().root().map(|node| node.r().get_unique_id()).unwrap_or("".to_owned()),
-            nodeType: self.NodeType() as uint,
+            nodeType: self.NodeType() as usize,
             namespaceURI: "".to_owned(), //FIXME
             nodeName: self.NodeName(),
-            numChildren: self.ChildNodes().root().r().Length() as uint,
+            numChildren: self.ChildNodes().root().r().Length() as usize,
 
             //FIXME doctype nodes only
             name: "".to_owned(),
diff --git a/components/script/dom/performance.rs b/components/script/dom/performance.rs
index 45fa9ffe002..ef0238ea4fc 100644
--- a/components/script/dom/performance.rs
+++ b/components/script/dom/performance.rs
@@ -51,7 +51,7 @@ impl<'a> PerformanceMethods for JSRef<'a, Performance> {
     // https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HighResolutionTime/Overview.html#dom-performance-now
     fn Now(self) -> DOMHighResTimeStamp {
         let navStart = self.timing.root().r().NavigationStartPrecise();
-        let now = (time::precise_time_ns() as f64 - navStart) * 1000000u as f64;
+        let now = (time::precise_time_ns() as f64 - navStart) * 1000000 as f64;
         Finite::wrap(now)
     }
 }
diff --git a/components/script/dom/treewalker.rs b/components/script/dom/treewalker.rs
index d13b730af0d..1957999bcf4 100644
--- a/components/script/dom/treewalker.rs
+++ b/components/script/dom/treewalker.rs
@@ -330,7 +330,7 @@ impl<'a> PrivateTreeWalkerHelpers for JSRef<'a, TreeWalker> {
     fn accept_node(self, node: JSRef<Node>) -> Fallible<u16> {
         // "To filter node run these steps:"
         // "1. Let n be node's nodeType attribute value minus 1."
-        let n: uint = node.NodeType() as uint - 1;
+        let n = node.NodeType() - 1;
         // "2. If the nth bit (where 0 is the least significant bit) of whatToShow is not set,
         //     return FILTER_SKIP."
         if (self.what_to_show & (1 << n)) == 0 {
diff --git a/components/script/dom/xmlhttprequest.rs b/components/script/dom/xmlhttprequest.rs
index a973d1e970a..5a944454f8b 100644
--- a/components/script/dom/xmlhttprequest.rs
+++ b/components/script/dom/xmlhttprequest.rs
@@ -94,7 +94,7 @@ impl Runnable for XHRProgressHandler {
 
 #[derive(PartialEq, Clone, Copy)]
 #[jstraceable]
-pub struct GenerationId(uint);
+pub struct GenerationId(u32);
 
 #[derive(Clone)]
 pub enum XHRProgress {
@@ -148,7 +148,7 @@ pub struct XMLHttpRequest {
     request_method: DOMRefCell<Method>,
     request_url: DOMRefCell<Option<Url>>,
     request_headers: DOMRefCell<Headers>,
-    request_body_len: Cell<uint>,
+    request_body_len: Cell<usize>,
     sync: Cell<bool>,
     upload_complete: Cell<bool>,
     upload_events: Cell<bool>,
diff --git a/components/script/lib.rs b/components/script/lib.rs
index 44ac6f1856c..157e0e27bdb 100644
--- a/components/script/lib.rs
+++ b/components/script/lib.rs
@@ -7,7 +7,6 @@
 #![feature(collections)]
 #![feature(core)]
 #![feature(custom_attribute)]
-#![feature(int_uint)]
 #![feature(old_io)]
 #![feature(path)]
 #![feature(plugin)]
diff --git a/components/script/textinput.rs b/components/script/textinput.rs
index 470257495b9..8239c08c58f 100644
--- a/components/script/textinput.rs
+++ b/components/script/textinput.rs
@@ -225,9 +225,9 @@ impl TextInput {
             if adjust.abs() as usize > remaining && self.edit_point.line > 0 {
                 self.adjust_vertical(-1, select);
                 self.edit_point.index = self.current_line_length();
-                self.adjust_horizontal(adjust + remaining as int + 1, select);
+                self.adjust_horizontal(adjust + remaining as isize + 1, select);
             } else {
-                self.edit_point.index = max(0, self.edit_point.index as int + adjust) as usize;
+                self.edit_point.index = max(0, self.edit_point.index as isize + adjust) as usize;
             }
         } else {
             let remaining = self.current_line_length() - self.edit_point.index;
@@ -235,7 +235,7 @@ impl TextInput {
                 self.adjust_vertical(1, select);
                 self.edit_point.index = 0;
                 // one shift is consumed by the change of line, hence the -1
-                self.adjust_horizontal(adjust - remaining as int - 1, select);
+                self.adjust_horizontal(adjust - remaining as isize - 1, select);
             } else {
                 self.edit_point.index = min(self.current_line_length(),
                                             self.edit_point.index + adjust as usize);