Update README.md

Author: pawanjenu

README.md

@@ -1,7 +1,7 @@
 # LeetcodeSessionManager [![Build and Release](https://github.com/pawanjenu/LeetcodeSessionManager/actions/workflows/main.yml/badge.svg?branch=master)](https://github.com/pawanjenu/LeetcodeSessionManager/actions/workflows/main.yml)
 #### Multiple Users, 1 Leetcode Premium Account!
 <p align="center">
-  <a href="https://addons.mozilla.org/en-US/firefox/addon/leetsessionmanagerr/" target="_blank">
+  <a href="https://addons.mozilla.org/en-US/firefox/addon/leetsessionmanager/" target="_blank">
     <img width="149" height="48" src="badges/Firefox.png?raw=true">
   </a>
   <a href="https://chrome.google.com/webstore/detail/nophchlleabfnhjonhnhjiacdjhjkghb" target="_blank">