diff --git a/README.md b/README.md
index 61964eb..2434193 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
+put script.js into any userscript extension, like Tampermonkey or Violentmonkey
+
 https://humanbenchmark.com/tests/reactiontime
\ No newline at end of file