diff --git a/source/types.d.ts b/source/types.d.ts
index 67e9051..17d41e9 100644
--- a/source/types.d.ts
+++ b/source/types.d.ts
@@ -13,6 +13,7 @@ declare global {
     readonly DEV: boolean;
     readonly MODE: string;
     readonly PROD: boolean;
+    readonly VITE_BROWSER: 'chromium' | 'firefox';
   }
 
   type HtmComponent = ReturnType<typeof html>;