Go to a person's Facebook friends list. Scroll until all friends are loaded. Run script in Console and it will produce a log group of "Friend Name: <profile-link>"

FacebookFriends.js

var divs = document.getElementsByTagName("div");
var list = new Array();
for( var i = 0; i < divs.length; i++ ) {
    if( divs[i].getAttribute("data-testid") == "friend_list_item") {
        var friend = divs[i].getElementsByClassName("fwb")[0];
        var profile = friend.getElementsByTagName("a")[0];
        list.push(friend.innerText + ": " + profile.href);
    }
}
console.log(list.length+" friends");
document.write(list.sort().join("<br/>"));