How To Delete All Facebook Message in One Click ?

It takes a lot of time to delete chats one by one specially girls chat :v So here I got a trick to delete all the messages in one click!

Requirements

1. Mozilla Firefox
2. Grease Money

Steps 

1. Open Mozilla Firefox

2. Install Grease Monkey Addon

3. Restart Firefox

4. Go To Userscripts and install this script

5. Now Login In Your Facebook Account

6. Go To messages there you will see a delete button

7. Use it to delete all the messages in once