A TamperMonkey script that lets you easily find and match multiple transactions in Xero to reconcile.

Xero Helper.js

// ==UserScript==
// @name         Xero Bank Rec Helper
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://go.xero.com/Bank/BankRec.aspx*
// @grant        none
// ==/UserScript==




(function() {
    'use strict';

    function addJQuery(callback) {
        var script = document.createElement("script");
        script.setAttribute("src", "//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js");
        script.addEventListener('load', function() {
            var script = document.createElement("script");
            script.textContent = "window.jQ=jQuery.noConflict(true);(" + callback.toString() + ")();";
            document.body.appendChild(script);
        }, false);
        document.body.appendChild(script);
    }

    function main(){

        function load() {
            var $em = jQ("<div class='paulsearch' style='clear: both;'><textarea class='codes' style='width: 200px; height: 150px'></textarea><a class='xbtn blue startbutton'>Start</a></div>");

            jQ(".bankrec-search-form").not(".paulified").each(function () {
                var $form = jQ(this);
                console.log($form);
                $form.before($em);
                var $inserted = jQ(".paulsearch", $form.parent());
                console.log($inserted);
                var codesTextBox = jQ(".codes", $inserted);

                jQ(".clear", $form).css("display", "none");

                var codes = [];
                var currentCode = null;

                function nextCode() {
                    if (!currentCode) {
                        currentCode = codes.shift();
                        if (!currentCode) {
                            return;
                        }

                        codesTextBox.val(codes.join("\n"));
                        console.log("Searching", currentCode);
                        jQ("#searchNameText", $form).val(currentCode);
                        var goButton = jQ(".newsearchcol a.xbtn.blue").filter(function() { return jQ(this).text() == "Go"; });
                        goButton.click();
                    }
                }

                function awaitResults() {
                    var $resultsTable = jQ("#availableTransactionList", $form.parent());
                    jQ("div.ref.newpayref", $resultsTable).each(function () {
                        var $ref = jQ(this);
                        var ref = $ref.text();
                        var isMatch = ref.startsWith(currentCode);
                        if (isMatch) {
                            console.log("found it!");
                            var parentRow = $ref.parent(".transaction-row");
                            parentRow.css("background", "lightyellow");
                            var checkbox = jQ("input.checkbox", parentRow);
                            if (!checkbox.prop("checked")){
                                checkbox.click();
                                currentCode = null;
                            }
                        }
                    });
                }

                function autoCheckTimer() {
                    awaitResults();
                    nextCode();
                    setTimeout(autoCheckTimer, 500);
                };

                autoCheckTimer();

                jQ(".startbutton", $inserted).click(function() {
                    var text = codesTextBox.val();
                    codes = text.split(/\r?\n/);
                    currentCode = null;
                });

                $form.addClass("paulified");
            });
        };

        function loadOnTimer() {
            load();
            setTimeout(loadOnTimer, 500);
        }
        loadOnTimer();
        //Jquery Here
    }

    // load jQuery and execute the main function
    addJQuery(main);

})();