diff --git a/.vitepress/theme/search.ts b/.vitepress/theme/search.ts
index 7f7ad33..bd1114b 100644
--- a/.vitepress/theme/search.ts
+++ b/.vitepress/theme/search.ts
@@ -1,4 +1,9 @@
 export function tokenize(text: string): Array<string> {
+  // Firefox doesn't support Intl.Segmenter currently
+  if (!("Segmenter" in Intl)) {
+    return text.split(" ");
+  }
+
   // @ts-ignore: seems like Intl.Segmenter is not supported by the lang server
   const segmenter = new Intl.Segmenter("cn", { granularity: "word" });
   const words = Array.from(segmenter.segment(text)).map(