// ==UserScript==
// @name         ao3 remove extra line breaks
// @namespace    https://greasyfork.org/en/users/36620
// @version      0.4
// @description  change multiple break tags into one and collapse empty paragraphs
// @author       scriptfairy
// @include      http*://archiveofourown.org/works/*
// @grant        none
// @run-at       context-menu
// @downloadURL none
// ==/UserScript==

(function($) {
    $('<style>').text('#chapters br+br {display:none;}').appendTo($('head'));
    var nbsp = $('#chapters').html().replace(/&nbsp;/g, ' ');
    $('#chapters').html(nbsp);
})(window.jQuery);