Export friends from https://iphone.facebook.com/friends/center/friends/

friend_export.js

var friendsElems = document.querySelectorAll('[data-sigil=undoable-action]');
var friends = []
for(var i = 0; i<friendsElems.length; i++){
	var elem = friendsElems[i];
	var innerElem = elem.children[1].children[0];
	var name = innerElem.children[0].children[0].innerText

	var json = innerElem.children[innerElem.children.length-1].children[0].children[0].dataset.store
	var id = JSON.parse(json).id;

	var extra = innerElem.children[1].children[0].querySelectorAll('[data-sigil=m-add-friend-source-replaceable]')[0];
	
	var extraInfo;
	if(extra.children.length == 0){
		extraInfo = extra.innerText;
    }else{
		extraInfo = extra.children[0].innerText
    }

	var imageElem = elem.children[0].children[0].children[0].style.backgroundImage;
	var imageUrl = imageElem.replace("url(\"", "").replace("\")", "");
	var friend = [id, name, imageUrl]
	friends.push(friend);
}

var csvContent = "data:text/csv;charset=utf-8,";
friends.forEach(function(infoArray, index){

   dataString = infoArray.join(",");
   csvContent += index < friends.length ? dataString+ "\n" : dataString;

}); 

var encodedUri = encodeURI(csvContent);
window.open(encodedUri);