How To Delete All Facebook Massages At once

follow the steps given bellow
1: install the extension delete massages on facebook
                                  
                                    ADD To CHROME  

2: after installing give information about it.
3: open your facebook account.
3: go to inbox area.
4: the 4rth is when you open your chat massages you will see a icon of extension at the top side of URL.

5: now the click the icon button after processing all massages will delete


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