diff --git a/components/Package/CodeBrowser/CodeBrowserFileTree.tsx b/components/Package/CodeBrowser/CodeBrowserFileTree.tsx
index 94fa539e..01768802 100644
--- a/components/Package/CodeBrowser/CodeBrowserFileTree.tsx
+++ b/components/Package/CodeBrowser/CodeBrowserFileTree.tsx
@@ -9,9 +9,16 @@ type Props = {
   activeFile: string | null;
   onSelectFile: (filePath: string) => void;
   depth?: number;
+  isNested?: boolean;
 };
 
-export default function CodeBrowserFileTree({ tree, activeFile, onSelectFile, depth = 0 }: Props) {
+export default function CodeBrowserFileTree({
+  tree,
+  activeFile,
+  onSelectFile,
+  depth = 0,
+  isNested = false,
+}: Props) {
   const directories = Object.values(tree.directories).sort((a, b) => a.name.localeCompare(b.name));
   const files = [...tree.files].sort((a, b) => a.name.localeCompare(b.name));
 
@@ -39,17 +46,22 @@ export default function CodeBrowserFileTree({ tree, activeFile, onSelectFile, de
             depth={depth}
             onPress={() => onSelectFile(file.path)}
             isActive={file.path === activeFile}
+            isNested={isNested}
           />
-          {file.nestedFiles?.map(nestedFile => (
-            <CodeBrowserFileRow
-              isNested
-              key={nestedFile.path}
-              label={nestedFile.name}
+          {file.nestedFiles && (
+            <CodeBrowserFileTree
+              tree={{
+                name: '',
+                path: file.path,
+                directories: {},
+                files: file.nestedFiles,
+              }}
+              activeFile={activeFile}
+              onSelectFile={onSelectFile}
               depth={depth + 1}
-              onPress={() => onSelectFile(nestedFile.path)}
-              isActive={nestedFile.path === activeFile}
+              isNested
             />
-          ))}
+          )}
         </View>
       ))}
     </>
diff --git a/components/Package/CodeBrowser/DisplayModeButton.tsx b/components/Package/CodeBrowser/DisplayModeButton.tsx
index 5a273098..62fd039b 100644
--- a/components/Package/CodeBrowser/DisplayModeButton.tsx
+++ b/components/Package/CodeBrowser/DisplayModeButton.tsx
@@ -1,7 +1,7 @@
 import { Pressable, View } from 'react-native';
 
 import { useLayout } from '~/common/styleguide';
-import { MinimizeIcon } from '~/components/Icons';
+import { MaximizeIcon, MinimizeIcon } from '~/components/Icons';
 import InputKeyHint from '~/components/InputKeyHint';
 import Tooltip from '~/components/Tooltip';
 import tw from '~/util/tailwind';
@@ -14,7 +14,7 @@ type Props = {
 export default function DisplayModeButton({ isBrowserMaximized, toggleMaximized }: Props) {
   const { isSmallScreen } = useLayout();
 
-  const Icon = isBrowserMaximized ? MinimizeIcon : MinimizeIcon;
+  const Icon = isBrowserMaximized ? MinimizeIcon : MaximizeIcon;
 
   return (
     <Tooltip
diff --git a/components/Package/CodeBrowser/index.tsx b/components/Package/CodeBrowser/index.tsx
index b480ab9a..5b5fe14e 100644
--- a/components/Package/CodeBrowser/index.tsx
+++ b/components/Package/CodeBrowser/index.tsx
@@ -9,7 +9,7 @@ import { type LibraryType, type UnpkgMeta } from '~/types';
 import {
   buildCodeBrowserFileTree,
   getCodeBrowserFilePath,
-  getCodeBrowserNestedFileParentPath,
+  getCodeBrowserNestedFileParentPaths,
 } from '~/util/codeBrowser';
 import { TimeRange } from '~/util/datetime';
 import { formatBytes } from '~/util/formatBytes';
@@ -67,9 +67,7 @@ export default function CodeBrowser({
     for (const file of files) {
       filesByPath.set(file.path, file);
 
-      const nestedFileParentPath = getCodeBrowserNestedFileParentPath(file.path);
-
-      if (nestedFileParentPath) {
+      getCodeBrowserNestedFileParentPaths(file.path).forEach(nestedFileParentPath => {
         relatedPaths.set(
           file.path,
           (relatedPaths.get(file.path) ?? new Set()).add(nestedFileParentPath)
@@ -78,7 +76,7 @@ export default function CodeBrowser({
           nestedFileParentPath,
           (relatedPaths.get(nestedFileParentPath) ?? new Set()).add(file.path)
         );
-      }
+      });
 
       const relativePath = getCodeBrowserFilePath(file.path, data?.prefix).toLowerCase();
 
diff --git a/util/codeBrowser.ts b/util/codeBrowser.ts
index d88d5e0f..e8deaaeb 100644
--- a/util/codeBrowser.ts
+++ b/util/codeBrowser.ts
@@ -104,6 +104,12 @@ const SOURCE_MAP_PARENT_EXTENSIONS = new Set([
   'tsx',
 ]);
 
+const DECLARATION_FILE_PARENT_EXTENSIONS = new Map([
+  ['.d.cts', ['cjs']],
+  ['.d.mts', ['mjs']],
+  ['.d.ts', ['js', 'mjs', 'cjs']],
+]);
+
 const HASH_FILE_EXTENSIONS = new Set(['md5', 'sha1', 'sha3', 'sha256', 'sha512']);
 
 export function getFileWarning(fileName?: string) {
@@ -118,10 +124,26 @@ export function getCodeBrowserFilePath(path: string, prefix?: string) {
 }
 
 export function getCodeBrowserNestedFileParentPath(path: string) {
+  return getCodeBrowserNestedFileParentPaths(path)[0] ?? null;
+}
+
+export function getCodeBrowserNestedFileParentPaths(path: string) {
+  const lowerCasedPath = path.toLowerCase();
+
+  for (const [declarationFileSuffix, parentExtensions] of DECLARATION_FILE_PARENT_EXTENSIONS) {
+    if (!lowerCasedPath.endsWith(declarationFileSuffix)) {
+      continue;
+    }
+
+    const declarationFileBasePath = path.slice(0, -declarationFileSuffix.length);
+
+    return parentExtensions.map(parentExtension => `${declarationFileBasePath}.${parentExtension}`);
+  }
+
   const nestedFileExtension = path.split('.').pop()?.toLowerCase();
 
   if (!nestedFileExtension) {
-    return null;
+    return [];
   }
 
   const nestedFileParentPath = path.slice(0, -(nestedFileExtension.length + 1));
@@ -130,17 +152,17 @@ export function getCodeBrowserNestedFileParentPath(path: string) {
     const sourceMapParentExtension = nestedFileParentPath.split('.').pop()?.toLowerCase();
 
     if (!sourceMapParentExtension || !SOURCE_MAP_PARENT_EXTENSIONS.has(sourceMapParentExtension)) {
-      return null;
+      return [];
     }
 
-    return nestedFileParentPath;
+    return [nestedFileParentPath];
   }
 
   if (HASH_FILE_EXTENSIONS.has(nestedFileExtension)) {
-    return nestedFileParentPath;
+    return [nestedFileParentPath];
   }
 
-  return null;
+  return [];
 }
 
 export function buildCodeBrowserFileTree(
@@ -197,13 +219,9 @@ function nestCodeBrowserSidecarFiles(directory: CodeBrowserTreeDirectory) {
   const nestedFilePaths = new Set<string>();
 
   directory.files.forEach(file => {
-    const nestedFileParentPath = getCodeBrowserNestedFileParentPath(file.path);
-
-    if (!nestedFileParentPath) {
-      return;
-    }
-
-    const nestedFileParent = filesByPath.get(nestedFileParentPath);
+    const nestedFileParent = getCodeBrowserNestedFileParentPaths(file.path)
+      .map(nestedFileParentPath => filesByPath.get(nestedFileParentPath))
+      .find(Boolean);
 
     if (!nestedFileParent) {
       return;