My inayopendelewa site for ikoni is Iconomize.com because the ikoni wewe choose automatically installs to your desktop with the shortcut already set. They have the Facebook ikoni here, link Just click to install and it goes right on the desktop.
In fact yes wewe can:First wewe go in Google picha and type "FACEBOOK ICONS"and save the pic,then wewe go and search"www.iconverticons.com",convert the pic into an ikoni and download it,then go in the desktop: go to"new","shortcut",type:"www.facebook.com",then name it "Facebook",then right click on the shortcut ,go to properties,change ikoni and choose the one wewe converted before,then press APPLY.and then it should come perfect