I believe you can copy and paste from your desktop to your profile page.

yeah,, you go to where it says my account at the top of your page,then scroll down to settings and then change profile picture. if you copy and paste whatever picture you want you put it into the search box there or hit the browse button next too search box if your going to download a picture from your comp. and then hit save after you put it in. good luck,,hope this helps you,,,,, hit me back if you need more help,,,,,,,,,,,