diff --git a/components/script/dom/cssstyledeclaration.rs b/components/script/dom/cssstyledeclaration.rs
index eb0e473ca41..1e0b13b2ee3 100644
--- a/components/script/dom/cssstyledeclaration.rs
+++ b/components/script/dom/cssstyledeclaration.rs
@@ -211,7 +211,7 @@ impl<'a> CSSStyleDeclarationMethods for JSRef<'a, CSSStyleDeclaration> {
         }
 
         // Step 6
-        let mut synthesized_declaration = String::from_str(&property);
+        let mut synthesized_declaration = property;
         synthesized_declaration.push_str(": ");
         synthesized_declaration.push_str(&value);
 
diff --git a/components/script/dom/webglrenderingcontext.rs b/components/script/dom/webglrenderingcontext.rs
index 1ce9561d90a..786a3c25620 100644
--- a/components/script/dom/webglrenderingcontext.rs
+++ b/components/script/dom/webglrenderingcontext.rs
@@ -101,10 +101,10 @@ impl<'a> WebGLRenderingContextMethods for JSRef<'a, WebGLRenderingContext> {
         // TODO(ecoal95): Implement the missing parameters from the spec
         match parameter {
             WebGLRenderingContextConstants::VERSION =>
-                DOMString::from_str("WebGL 1.0").to_jsval(cx),
+                "WebGL 1.0".to_jsval(cx),
             WebGLRenderingContextConstants::RENDERER |
             WebGLRenderingContextConstants::VENDOR =>
-                DOMString::from_str("Mozilla/Servo").to_jsval(cx),
+                "Mozilla/Servo".to_jsval(cx),
             _ => NullValue(),
         }
     }
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 8be87d5be17..c6de7bcca82 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -1038,7 +1038,7 @@ fn should_move_clip_rect(clip_rect: Rect<Au>, new_viewport: Rect<f32>) -> bool{
 }
 
 fn debug_reflow_events(goal: &ReflowGoal, query_type: &ReflowQueryType, reason: &ReflowReason) {
-    let mut debug_msg = String::from_str("****");
+    let mut debug_msg = "****".to_owned();
     debug_msg.push_str(match *goal {
         ReflowGoal::ForDisplay => "\tForDisplay",
         ReflowGoal::ForScriptQuery => "\tForScriptQuery",
diff --git a/ports/cef/command_line.rs b/ports/cef/command_line.rs
index dd932a22d74..9af3709f4cd 100644
--- a/ports/cef/command_line.rs
+++ b/ports/cef/command_line.rs
@@ -36,7 +36,7 @@ pub fn command_line_init(argc: c_int, argv: *const *const u8) {
         for i in 0..(argc as usize) {
             let slice = ffi::CStr::from_ptr(*argv.offset(i as isize) as *const c_char);
             let s = str::from_utf8(slice.to_bytes()).unwrap();
-            a.push(String::from_str(s));
+            a.push(s.to_owned());
         }
         let cl = command_line_new();
         (*cl).argc = argc;
diff --git a/ports/cef/string_map.rs b/ports/cef/string_map.rs
index 41225c9ed5a..b7fd8dffcc3 100644
--- a/ports/cef/string_map.rs
+++ b/ports/cef/string_map.rs
@@ -40,10 +40,9 @@ pub extern "C" fn cef_string_map_append(sm: *mut cef_string_map_t, key: *const c
         if sm.is_null() { return 0; }
         let v = string_map_to_treemap(sm);
         slice_to_str((*key).str as *const u8, (*key).length as usize, |result| {
-            let s = String::from_str(result);
             let csv = cef_string_userfree_utf16_alloc();
             cef_string_utf16_set((*value).str as *const u16, (*value).length, csv, 1);
-            (*v).insert(s, csv);
+            (*v).insert(result.to_owned(), csv);
             1
         })
     }
@@ -55,7 +54,7 @@ pub extern "C" fn cef_string_map_find(sm: *mut cef_string_map_t, key: *const cef
         if sm.is_null() { return 0; }
         let v = string_map_to_treemap(sm);
         slice_to_str((*key).str as *const u8, (*key).length as usize, |result| {
-            match (*v).get(&String::from_str(result)) {
+            match (*v).get(result) {
                 Some(s) => {
                     cef_string_utf16_set((**s).str as *const u16, (**s).length, value, 1);
                     1
diff --git a/ports/cef/string_multimap.rs b/ports/cef/string_multimap.rs
index 909039bc2ad..4640d9864b6 100644
--- a/ports/cef/string_multimap.rs
+++ b/ports/cef/string_multimap.rs
@@ -44,7 +44,7 @@ pub extern "C" fn cef_string_multimap_find_count(smm: *mut cef_string_multimap_t
         if smm.is_null() { return 0; }
         let v = string_multimap_to_treemap(smm);
         slice_to_str((*key).str as *const u8, (*key).length as usize, |result| {
-            match (*v).get(&String::from_str(result)) {
+            match (*v).get(result) {
                 Some(s) =>  s.len() as c_int,
                 None => 0
             }
@@ -58,12 +58,11 @@ pub extern "C" fn cef_string_multimap_append(smm: *mut cef_string_multimap_t, ke
         if smm.is_null() { return 0; }
         let v = string_multimap_to_treemap(smm);
         slice_to_str((*key).str as *const u8, (*key).length as usize, |result| {
-            let s = String::from_str(result);
             let csv = cef_string_userfree_utf16_alloc();
             cef_string_utf16_set((*value).str as *const u16, (*value).length, csv, 1);
-            match (*v).get_mut(&s) {
+            match (*v).get_mut(result) {
                 Some(vc) => (*vc).push(csv),
-                None => { (*v).insert(s, vec!(csv)); }
+                None => { (*v).insert(result.to_owned(), vec!(csv)); }
             }
             1
         })
@@ -76,7 +75,7 @@ pub extern "C" fn cef_string_multimap_enumerate(smm: *mut cef_string_multimap_t,
         if smm.is_null() { return 0; }
         let v = string_multimap_to_treemap(smm);
         slice_to_str((*key).str as *const u8, (*key).length as usize, |result| {
-            match (*v).get(&String::from_str(result)) {
+            match (*v).get(result) {
                 Some(s) => {
                     if (*s).len() <= index as usize {
                         return 0;