diff --git a/index.html b/index.html
index 275efa2..7b7e906 100644
--- a/index.html
+++ b/index.html
@@ -47,7 +47,7 @@
     <main class="main">
       <div id="notSupported" class="notSupported">
         Sorry, <b>Web Serial</b> is not supported on this device, make sure
-        you're running Chrome 89 or later.
+        you are running at least Firefox 151 or Chrome 89.
       </div>
       <div class="subheader">
         <div class="title left">Adafruit WebSerial ESPTool</div>