--- a/firefox-devel.rst	Fri Sep 27 17:12:48 2013 +0300
+++ b/firefox-devel.rst	Mon Oct 07 15:07:16 2013 +0300
@@ -48,6 +48,14 @@
   http://www.fiddler2.com/fiddler2/
                 Web Debugging Proxy
 
+Wappalyzer.
+-----------
+
+Reverse which libraries and frameworks used by page.
+
+  https://addons.mozilla.org/en-US/firefox/addon/wappalyzer/
+                download page
+
 Tamper Data.
 ------------