diff --git a/deploy/createTypesPackages.js b/deploy/createTypesPackages.js
index 98c31dce7..e660a481f 100644
--- a/deploy/createTypesPackages.js
+++ b/deploy/createTypesPackages.js
@@ -134,7 +134,9 @@ const go = async () => {
 
     // Migrate in the template files
     for (const templateFile of fs.readdirSync(templateDir)) {
-      if (templateFile.startsWith(".")) continue;
+      if (templateFile.startsWith(".")) {
+        continue;
+      }
 
       const templatedFile = new URL(templateFile, templateDir);
       fs.copyFileSync(templatedFile, new URL(templateFile, packagePath));
@@ -242,15 +244,21 @@ function prependAutoImports(pkg, packagePath) {
   const groups = new Map();
   for (const file of pkg.files) {
     let files = groups.get(file.group);
-    if (!files) groups.set(file.group, (files = []));
+    if (!files) {
+      groups.set(file.group, (files = []));
+    }
     files.push(file);
   }
   for (const files of groups.values()) {
     const indexFile = files.find((file) => file.index);
-    if (!indexFile) continue;
+    if (!indexFile) {
+      continue;
+    }
 
     const index = new URL(indexFile.to, packagePath);
-    if (!fs.existsSync(index)) continue;
+    if (!fs.existsSync(index)) {
+      continue;
+    }
 
     const toPrepend = files
       .filter((f) => !!f.autoImport)
@@ -270,8 +278,12 @@ function prependAutoImports(pkg, packagePath) {
  * @param {URL} to
  */
 function relativeUrl(from, to) {
-  if (from.origin !== to.origin) return to.toString();
-  if (!from.pathname.endsWith("/")) from = new URL("./", from);
+  if (from.origin !== to.origin) {
+    return to.toString();
+  }
+  if (!from.pathname.endsWith("/")) {
+    from = new URL("./", from);
+  }
   const relative = path.posix.relative(from.pathname, to.pathname);
   return path.isAbsolute(relative) ||
     relative.startsWith("../") ||
diff --git a/deploy/deployChangedPackages.js b/deploy/deployChangedPackages.js
index 5bb3d1c12..851cd59a2 100644
--- a/deploy/deployChangedPackages.js
+++ b/deploy/deployChangedPackages.js
@@ -64,8 +64,9 @@ for (const dirName of fs.readdirSync(generatedDir)) {
         `${pkgJSON.name}@${olderVersion}/${filemap.to}`,
       );
       console.log(` - ${file}`);
-      if (oldFile !== generatedDTSContent)
+      if (oldFile !== generatedDTSContent) {
         printUnifiedDiff(oldFile, generatedDTSContent);
+      }
 
       const title = `## \`${file}\``;
       const notes = generateChangelogFrom(oldFile, generatedDTSContent);
diff --git a/deploy/migrate.js b/deploy/migrate.js
index 048eda0b4..5a8a30148 100644
--- a/deploy/migrate.js
+++ b/deploy/migrate.js
@@ -10,10 +10,11 @@ import { join } from "path";
 const maybeTSWorkingDir = [process.argv[2], "../TypeScript", "TypeScript"];
 const tscWD = maybeTSWorkingDir.find((wd) => existsSync(wd));
 
-if (!tscWD)
+if (!tscWD) {
   throw new Error(
     "Could not find a TypeScript clone to put the generated files in.",
   );
+}
 
 const generatedFiles = readdirSync("generated");
 const filesToSend = generatedFiles.filter(
diff --git a/deploy/versionChangelog.js b/deploy/versionChangelog.js
index fc120d82d..c481af071 100644
--- a/deploy/versionChangelog.js
+++ b/deploy/versionChangelog.js
@@ -17,8 +17,9 @@ const go = () => {
   // We'll need to map back from the filename in the npm package to the
   // generated file in baselines inside the git tag
   const thisPackageMeta = packages.find((p) => p.name === name);
-  if (!thisPackageMeta)
+  if (!thisPackageMeta) {
     throw new Error(`Could not find ${name} in ${packages.map((p) => p.name)}`);
+  }
 
   for (const file of thisPackageMeta.files) {
     const filename = `baselines/${basename(file.from)}`;
diff --git a/eslint.config.mjs b/eslint.config.mjs
index 70f31bd73..c73969b73 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -22,6 +22,7 @@ export default typescriptEslint.config(
       "@typescript-eslint/no-explicit-any": 0,
       "@typescript-eslint/no-non-null-assertion": 0,
       "@typescript-eslint/no-var-requires": 0,
+      "curly": ["error", "all"],
     },
   },
 );
diff --git a/src/build.ts b/src/build.ts
index 953647004..f22b8fe82 100644
--- a/src/build.ts
+++ b/src/build.ts
@@ -141,7 +141,9 @@ async function emitDom() {
 
     for (const [key, target] of Object.entries(namespaces)) {
       const descObject = descriptions.interfaces.interface[key];
-      if (!descObject) continue;
+      if (!descObject) {
+        continue;
+      }
 
       merge(target, descObject, { optional: true });
     }
@@ -183,7 +185,9 @@ async function emitDom() {
         webidl.interfaces!.interface[partial.name] ||
         webidl.mixins!.mixin[partial.name];
       if (base) {
-        if (base.exposed) resolveExposure(partial, base.exposed);
+        if (base.exposed) {
+          resolveExposure(partial, base.exposed);
+        }
         merge(base.constants, partial.constants, { shallow: true });
         merge(base.methods, partial.methods, { shallow: true });
         merge(base.properties, partial.properties, { shallow: true });
@@ -192,7 +196,9 @@ async function emitDom() {
     for (const partial of w.partialMixins) {
       const base = webidl.mixins!.mixin[partial.name];
       if (base) {
-        if (base.exposed) resolveExposure(partial, base.exposed);
+        if (base.exposed) {
+          resolveExposure(partial, base.exposed);
+        }
         merge(base.constants, partial.constants, { shallow: true });
         merge(base.methods, partial.methods, { shallow: true });
         merge(base.properties, partial.properties, { shallow: true });
@@ -207,7 +213,9 @@ async function emitDom() {
     for (const partial of w.partialNamespaces) {
       const base = webidl.namespaces?.find((n) => n.name === partial.name);
       if (base) {
-        if (base.exposed) resolveExposure(partial, base.exposed);
+        if (base.exposed) {
+          resolveExposure(partial, base.exposed);
+        }
         merge(base.methods, partial.methods, { shallow: true });
         merge(base.properties, partial.properties, { shallow: true });
       }
@@ -351,7 +359,9 @@ async function emitDom() {
     return filterByNull(obj, template);
 
     function filterByNull(obj: any, template: any) {
-      if (!template) return obj;
+      if (!template) {
+        return obj;
+      }
       const filtered = Array.isArray(obj) ? obj.slice(0) : { ...obj };
       for (const k in template) {
         if (!obj[k]) {
diff --git a/src/build/emitter.ts b/src/build/emitter.ts
index c68ce4ebc..000a4fe7f 100644
--- a/src/build/emitter.ts
+++ b/src/build/emitter.ts
@@ -288,8 +288,11 @@ export function emitWebIdl(
 
   function getExtendList(iName: string): string[] {
     const i = allInterfacesMap[iName];
-    if (!i || !i.extends || i.extends === "Object") return [];
-    else return getExtendList(i.extends).concat(i.extends);
+    if (!i || !i.extends || i.extends === "Object") {
+      return [];
+    } else {
+      return getExtendList(i.extends).concat(i.extends);
+    }
   }
 
   function getImplementList(iName: string) {
@@ -377,8 +380,9 @@ export function emitWebIdl(
     if (obj.overrideType) {
       return obj.nullable ? makeNullable(obj.overrideType) : obj.overrideType;
     }
-    if (!obj.type)
+    if (!obj.type) {
       throw new Error("Missing 'type' field in " + JSON.stringify(obj));
+    }
     let type = convertDomTypeToTsTypeWorker(obj, forReturn);
     if (type === "Promise<undefined>") {
       type = "Promise<void>";
@@ -501,7 +505,9 @@ export function emitWebIdl(
       return objDomType;
     }
     // Name of a type alias. Just return itself
-    if (allTypedefsMap[objDomType]) return objDomType;
+    if (allTypedefsMap[objDomType]) {
+      return objDomType;
+    }
 
     throw new Error("Unknown DOM type: " + objDomType);
   }
@@ -522,9 +528,15 @@ export function emitWebIdl(
   function nameWithForwardedTypes(i: Browser.Interface) {
     const typeParameters = i.typeParameters;
 
-    if (i.overrideThis) return i.overrideThis;
-    if (!typeParameters) return i.name;
-    if (!typeParameters.length) return i.name;
+    if (i.overrideThis) {
+      return i.overrideThis;
+    }
+    if (!typeParameters) {
+      return i.name;
+    }
+    if (!typeParameters.length) {
+      return i.name;
+    }
 
     return `${i.name}<${typeParameters.map((t) => t.name)}>`;
   }
@@ -971,7 +983,9 @@ export function emitWebIdl(
       comments.push("Available only in secure contexts.");
     }
     if (entity.mdnUrl) {
-      if (comments.length > 0) comments.push("");
+      if (comments.length > 0) {
+        comments.push("");
+      }
       comments.push(`[MDN Reference](${entity.mdnUrl})`);
     }
 
@@ -1384,30 +1398,34 @@ export function emitWebIdl(
             mTypes.length === 0 &&
             amTypes.length === 1 &&
             pTypes.length === 0
-          )
+          ) {
             return amTypes[0] === sig.type;
+          }
           if (
             mTypes.length === 1 &&
             amTypes.length === 1 &&
             pTypes.length === 0
-          )
+          ) {
             return mTypes[0] === amTypes[0] && amTypes[0] === sig.type;
+          }
           if (
             mTypes.length === 0 &&
             amTypes.length === 1 &&
             pTypes.length === 1
-          )
+          ) {
             return amTypes[0] === pTypes[0] && amTypes[0] === sig.type;
+          }
           if (
             mTypes.length === 1 &&
             amTypes.length === 1 &&
             pTypes.length === 1
-          )
+          ) {
             return (
               mTypes[0] === amTypes[0] &&
               amTypes[0] === pTypes[0] &&
               amTypes[0] === sig.type
             );
+          }
         }
       }
     }
@@ -1674,7 +1692,9 @@ export function emitWebIdl(
   }
 
   function emitSelfIterator(i: Browser.Interface) {
-    if (!compilerBehavior.useIteratorObject) return;
+    if (!compilerBehavior.useIteratorObject) {
+      return;
+    }
     const async = i.iterator?.kind === "async_iterable";
     const name = getName(i);
     const iteratorBaseType = `${async ? "Async" : ""}IteratorObject`;
@@ -1770,10 +1790,13 @@ export function emitWebIdl(
         isIndexedPropertyGetter,
       );
 
-      if (anonymousGetter) return anonymousGetter;
-      else if (i.methods)
+      if (anonymousGetter) {
+        return anonymousGetter;
+      } else if (i.methods) {
         return mapToArray(i.methods.method).find(isIndexedPropertyGetter);
-      else return undefined;
+      } else {
+        return undefined;
+      }
     }
 
     function getIteratorSubtypes() {
diff --git a/src/build/expose.ts b/src/build/expose.ts
index 0031d256c..f2a6098bf 100644
--- a/src/build/expose.ts
+++ b/src/build/expose.ts
@@ -95,23 +95,27 @@ export function getExposedTypes(
     filtered.typedefs!.typedef = exposed;
   }
 
-  if (webidl.callbackFunctions)
+  if (webidl.callbackFunctions) {
     filtered.callbackFunctions!.callbackFunction = filterProperties(
       webidl.callbackFunctions!.callbackFunction,
       isKnownName,
     );
-  if (webidl.callbackInterfaces)
+  }
+  if (webidl.callbackInterfaces) {
     filtered.callbackInterfaces!.interface = filterProperties(
       webidl.callbackInterfaces!.interface,
       isKnownName,
     );
-  if (webidl.dictionaries)
+  }
+  if (webidl.dictionaries) {
     filtered.dictionaries!.dictionary = filterProperties(
       webidl.dictionaries.dictionary,
       isKnownName,
     );
-  if (webidl.enums)
+  }
+  if (webidl.enums) {
     filtered.enums!.enum = filterProperties(webidl.enums.enum, isKnownName);
+  }
 
   for (const unvisited of forceKnownTypesLogged.unvisitedValues()) {
     console.warn(`${unvisited} is redundant in knownTypes.json (${target})`);
diff --git a/src/build/mdn-comments.ts b/src/build/mdn-comments.ts
index db8b0ed01..991e54128 100644
--- a/src/build/mdn-comments.ts
+++ b/src/build/mdn-comments.ts
@@ -47,7 +47,9 @@ async function walkDirectory(dir: URL): Promise<URL[]> {
 
   for (const entry of entries) {
     if (entry.isDirectory()) {
-      if (entry.name === parentDirName) continue;
+      if (entry.name === parentDirName) {
+        continue;
+      }
       const subDir = new URL(`${entry.name}/`, dir);
       results = results.concat(await walkDirectory(subDir));
     } else if (entry.isFile() && entry.name === "index.md") {
@@ -139,7 +141,9 @@ export async function generateDescriptions(): Promise<{
       const content = await fs.readFile(fileURL, "utf-8");
       const slug = extractSlug(content);
       const generatedPath = generatePath(content);
-      if (!slug.length || !generatedPath) return;
+      if (!slug.length || !generatedPath) {
+        return;
+      }
 
       const summary = extractSummary(content);
       insertComment(results, slug, summary, generatedPath);
diff --git a/src/build/patches.ts b/src/build/patches.ts
index 6bf60fa05..c9b2683dc 100644
--- a/src/build/patches.ts
+++ b/src/build/patches.ts
@@ -56,7 +56,9 @@ function handleTyped(type: Node): Typed {
 }
 
 function handleTypeParameters(value: Value) {
-  if (!value) return {};
+  if (!value) {
+    return {};
+  }
   return {
     typeParameters: [
       {