diff --git a/components/script/canvas_state.rs b/components/script/canvas_state.rs
index 2956a8ce86c..5730d9a8f1f 100644
--- a/components/script/canvas_state.rs
+++ b/components/script/canvas_state.rs
@@ -1207,7 +1207,7 @@ impl CanvasState {
         if sw == 0 || sh == 0 {
             return Err(Error::IndexSize);
         }
-        ImageData::new(global, sw.abs() as u32, sh.abs() as u32, None)
+        ImageData::new(global, sw.unsigned_abs(), sh.unsigned_abs(), None)
     }
 
     // https://html.spec.whatwg.org/multipage/#dom-context-2d-createimagedata
diff --git a/components/script/dom/htmlinputelement.rs b/components/script/dom/htmlinputelement.rs
index 53fc8b3574b..b00d2079db6 100755
--- a/components/script/dom/htmlinputelement.rs
+++ b/components/script/dom/htmlinputelement.rs
@@ -2863,7 +2863,7 @@ impl Activatable for HTMLInputElement {
 fn filter_from_accept(s: &DOMString) -> Vec<FilterPattern> {
     let mut filter = vec![];
     for p in split_commas(s) {
-        if let Some('.') = p.chars().nth(0) {
+        if let Some('.') = p.chars().next() {
             filter.push(FilterPattern(p[1..].to_string()));
         } else if let Some(exts) = mime_guess::get_mime_extensions_str(p) {
             for ext in exts {
diff --git a/components/script/dom/response.rs b/components/script/dom/response.rs
index c199216c53c..f79472a9f71 100644
--- a/components/script/dom/response.rs
+++ b/components/script/dom/response.rs
@@ -299,7 +299,7 @@ impl ResponseMethods for Response {
         match *self.status.borrow() {
             Some(s) => {
                 let status_num = s.as_u16();
-                status_num >= 200 && status_num <= 299
+                (200..=299).contains(&status_num)
             },
             None => false,
         }
diff --git a/components/script/dom/serviceworkerglobalscope.rs b/components/script/dom/serviceworkerglobalscope.rs
index dbf792f62a0..69eca7f3b50 100644
--- a/components/script/dom/serviceworkerglobalscope.rs
+++ b/components/script/dom/serviceworkerglobalscope.rs
@@ -480,7 +480,7 @@ impl ServiceWorkerGlobalScope {
 
     fn dispatch_activate(&self) {
         let event = ExtendableEvent::new(self, atom!("activate"), false, false);
-        let event = (&*event).upcast::<Event>();
+        let event = (*event).upcast::<Event>();
         self.upcast::<EventTarget>().dispatch_event(event);
     }
 }
diff --git a/components/script/dom/stylepropertymapreadonly.rs b/components/script/dom/stylepropertymapreadonly.rs
index 91c44ed5409..78aaeede4a3 100644
--- a/components/script/dom/stylepropertymapreadonly.rs
+++ b/components/script/dom/stylepropertymapreadonly.rs
@@ -92,7 +92,7 @@ impl StylePropertyMapReadOnlyMethods for StylePropertyMapReadOnly {
                 } else {
                     Ordering::Greater
                 }
-            } else if let Ok(_) = custom_properties::parse_name(key2) {
+            } else if custom_properties::parse_name(key2).is_ok() {
                 Ordering::Less
             } else {
                 key1.cmp(key2)
diff --git a/components/script/dom/xmlhttprequest.rs b/components/script/dom/xmlhttprequest.rs
index 528e531c496..f9ba44d560f 100644
--- a/components/script/dom/xmlhttprequest.rs
+++ b/components/script/dom/xmlhttprequest.rs
@@ -1334,7 +1334,7 @@ impl XMLHttpRequest {
         let mime = self
             .final_mime_type()
             .as_ref()
-            .map(|m| normalize_type_string(&m.to_string()))
+            .map(|m| normalize_type_string(m.as_ref()))
             .unwrap_or("".to_owned());
 
         // Step 3, 4
diff --git a/components/script/script_module.rs b/components/script/script_module.rs
index aa1d6ed35dd..062a0b5ec99 100644
--- a/components/script/script_module.rs
+++ b/components/script/script_module.rs
@@ -1110,7 +1110,7 @@ impl FetchResponseListener for ModuleContext {
                 } else {
                     return Err(NetworkError::Internal(format!(
                         "Failed to parse MIME type: {}",
-                        content_type.to_string()
+                        content_type
                     )));
                 }
             } else {