trick to use two different Profile Picture in Facebook

hello friends ,
today I'm back with a cool facebook trick. witch allows you to use two different profile pictures at the same time
Thanks to Khalil (security Researcher) shares this tricks on his website and last year Khalil hacked Mark Zuckerberg profile page

 

 First of all log into your account

then open this link

https://www.facebook.com/me/photos_albums

Now , Open Profile picture album and open a photo that you want use as main profile picture

After opening photo, Check for its "fbid"id

 

Copy your photo's fbid (ex: this is my photo fbid 419771021427542)

Now time to chage your profile picture.

 Go to your profile and click on your current picture and click on 

edit Profile picture > Edit Thumbnail > now right click on your small profile picture and select Inspect Element

Scroll down inspect element and find this code
<form
action="https://upload.facebook.com/save_square_pic.pic.php"
now click on small array button and it will display some codes ( Check the below picture to understand clearly)

Here you need to repalace photo fbid with copied fbid id
Simply double click on value and paste fbid id
Now hit enter and click on save button. That's it your done!!