A small trick to use different profile pictures in your facebook account , follow these steps to make your account looks like the picture to the right . 

Hint : Click any picture to view in original size . This trick works on facebook pages .

1

Open this link : https://www.facebook.com/me/photos_albums

After that open your "Profile Pictures" Album , click any picture you want to use as nother profile picture for your facebook profile . 

2

After you clicked on the picture that you want to use as another profile picture in step "1" , look at the url and copy the "fbid" value , mine here is : 10151822490798885

3

Go to your facebook account , click your profile picture and choose "Edit Thumbnail" .

a pop up window will appear .

4

Right click on your profile picture and choose "Inspect element" .

5

Scroll down until you reach the code which start with : 
<form action="https://upload.facebook.com/save_square_pic.php"

Click the left small arrow to open the code .

scroll down a bit until you find this code : 

<input type="hidden" autocomplete="off" name="photo_fbid" value="102714738884">

Here we need to change the input field named "photo_fbid" value which is equal to : 102714738884 in the above code ,

notice that the value 102714738884 will not be the same as your code is . 

Double click on the value to edit it , or right click and choose edit html , paste the fbid value that you copied in step "2" above . 

6

Click any where to save the changed , close the "Inspect element" window , 

Finally click "Save" . 

This trick works on facebook pages check mine :
https://facebook.com/khalil.shr

Greets 

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