diff --git a/4.2.4-Header-Editor.md b/4.2.4-Header-Editor.md
index 2b5fb3f..cf3fd71 100644
--- a/4.2.4-Header-Editor.md
+++ b/4.2.4-Header-Editor.md
@@ -1,2 +1,15 @@
 [Header Editor](https://addons.mozilla.org/firefox/addon/header-editor/) | [GitHub](https://github.com/FirefoxBar/HeaderEditor)
 
+Header Editor is an extension that allows you to modify the request header and response header, cancel a request and redirect a request.
+
+:small_orange_diamond: remove all ETag's
+ * Test: https://httpbin.org/
+ * Test: http://lucb1e.com/rp/cookielesscookies/
+
+```
+        Name: remove all ETag's
+        Type: modify the Response header
+Execute type: normal
+ Header name: etag
+
+```
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