Possible Pre-Clean up before ad block

// ==UserScript==
// @name         Never repeat ads
// @namespace    http://tampermonkey.net/
// @version      1.4
// @description  Recursively hides all adverts ever seen before on facebook. able to leave open in a tab for it to work through large history prerequistie to ad block https://pastebin.com/vmaiA8jJ
// @author       You
// @match        https://www.facebook.com/adpreferences/advertisers/?entry_product=waist
// @icon         https://www.google.com/s2/favicons?domain=facebook.com
// @updateURL    https://pastebin.com/raw/rgZ1zD0u
// @downloadURL  https://pastebin.com/raw/rgZ1zD0u
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    let title = 'Never repeat ads';

    function userScript(){

        var reloadTimer;
        var stopPageCheck;


        function log(m) {
            console.warn(title, m);
        }

        function pageTimerLock() {
            if(window.location.href != 'https://www.facebook.com/adpreferences/advertisers/?entry_product=waist') {
                clearTimeout(stopPageCheck);
                clearTimeout(reloadTimer);
                log("Reload canceled");
            };
        }

        function getSpans(text) {
            return Array.from(document.querySelectorAll('span')).filter(e => {return e.innerHTML==text;});
        }

        function hide() {
            log('Hiding ads');
            getSpans('Hide Ads').forEach(e=>e.click());
        };

        function reload(){
            log('Refreshing page');
            location.reload();
        };

        if(getSpans('Hide Ads').length) {
            setTimeout(hide, 2000);
            reloadTimer = setTimeout(reload, 4000);

        } else {
            log('no ads to hide for now, checking later');
            reloadTimer = setTimeout(reload, 30000);
        };

        stopPageCheck = setInterval(pageTimerLock, 100);
    };

    try {
        userScript();
    } catch (e) {
        console.error(title, e);
    };
;
})();