getNextPageURL.js

var markup = document.documentElement.innerHTML;

var htmlEnDeCode = (function() {
    var charToEntityRegex,
        entityToCharRegex,
        charToEntity,
        entityToChar;

    function resetCharacterEntities() {
        charToEntity = {};
        entityToChar = {};
        // add the default set
        addCharacterEntities({
            '&'     :   '&',
            '>'      :   '>',
            '&lt;'      :   '<',
            '&quot;'    :   '"',
            '&#39;'     :   "'"
        });
    }

    function addCharacterEntities(newEntities) {
        var charKeys = [],
            entityKeys = [],
            key, echar;
        for (key in newEntities) {
            echar = newEntities[key];
            entityToChar[key] = echar;
            charToEntity[echar] = key;
            charKeys.push(echar);
            entityKeys.push(key);
        }
        charToEntityRegex = new RegExp('(' + charKeys.join('|') + ')', 'g');
        entityToCharRegex = new RegExp('(' + entityKeys.join('|') + '|&#[0-9]{1,5};' + ')', 'g');
    }

    function htmlEncode(value){
        var htmlEncodeReplaceFn = function(match, capture) {
            return charToEntity[capture];
        };

        return (!value) ? value : String(value).replace(charToEntityRegex, htmlEncodeReplaceFn);
    }

    function htmlDecode(value) {
        var htmlDecodeReplaceFn = function(match, capture) {
            return (capture in entityToChar) ? entityToChar[capture] : String.fromCharCode(parseInt(capture.substr(2), 10));
        };

        return (!value) ? value : String(value).replace(entityToCharRegex, htmlDecodeReplaceFn);
    }

    resetCharacterEntities();

    return {
        htmlEncode: htmlEncode,
        htmlDecode: htmlDecode
    };
})();

function getMatchesForRegExp(regex, markup) {
	var result = [];
	
	while ((index = markup.search(regex)) != -1) {
		var m = regex.exec(markup);
		
	    markup = markup.substring(index + 1);

		if (m.length > 0) {
			result.push(m[0]);
		}
	}
	
	return result;
}

//markup = htmlEnDeCode.htmlDecode(markup);

var encoded_query = getMatchesForRegExp(RegExp(/(encoded_query:\"\{.+?\}\")/), markup).slice(-1).pop();
var filter_ids = RegExp(/(filter_ids\s*:\s*[^}]+\})/).exec(markup).slice(-1).pop();
var encoded_title = RegExp(/(encoded_title\s*:\s*\"[^\"]*\")/).exec(markup).slice(-1).pop();
var ref_path = RegExp(/(ref_path\s*:\s*\"[^\"]*\")/).exec(markup).slice(-1).pop();
var cursor = RegExp(/BrowseScrollingPager.*(cursor:\"[^\"]*\")/).exec(markup).slice(-1).pop();
var impression_id = RegExp(/impression_id\s*:\s*(\"[^\"]+\")/).exec(markup).slice(-1).pop();
var tl_log = RegExp(/(encoded_title\s*:\s*\"[^\"]*\")/).exec(markup).slice(-1).pop();
var page_number = RegExp(/BrowseScrollingPager.*(page_number\s*:\s*\d+)/).exec(markup).slice(-1).pop();
var user_id = markup.match(RegExp(/\"USER_ID\":\"([0-9]*)\"/))[1]


var url = 'https://www.facebook.com/ajax/pagelet/generic.php/BrowseScrollingSetPagelet'
+ '?dpr=2'
+ '&data={'
	+ '"view":"list",' 
    + encoded_query + ',' 
    + encoded_title + ','
    + '"ref":"unknown",'
	+ '"logger_source":"www_main",'
	+ '"typeahead_sid":"",'
	+ '"tl_log":false,'
	+ '"impression_id":' + impression_id + ',' 
    + filter_ids + ','
    + '"experience_type":"grammar",'
	+ '"exclude_ids":null,'
	+ '"browse_location":"browse_location:browse",'
	+ '"trending_source":null,' 
    + ref_path + ','
    + '"is_trending":false,'
	+ '"topic_id":null,'
	+ '"story_id":null,'
	+ '"callsite":"browse_ui:init_result_set",'
	+ '"display_params":{"crct":"none"},' 
    + cursor + ',' 
    + page_number + ',' 
    + '"em":false,'
	+ '"tr":null}'
+ '&__user=' + user_id
+ '&__a=1'
+ '&__dyn='
+ '&__af='
+ '&__req=12'
+ '&__be='
+ '&__pc='
+ '&__rev='
+ '&__spin_r='
+ '&__spin_b='
+ '&__spin_t=';