This gist creates is a Userscript that adds a link to the NetSuite Debugger that lets you download the contents of the console to a file.

get_console_as_file

// ==UserScript==
// @name         Add Ability to Download Log as File from NetSuite Debugger
// @namespace    https://debugger.netsuite.com
// @version      0.1
// @description  This script adds a
// @author       S. Wilson.
// @match        https://debugger.netsuite.com/app/common/scripting/scriptdebugger.nl?*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var x = jQuery('table.bgsubtabbar tr');
    x.append( '<td valign="middle" nowrap="" id="getlogasfilelnk" class="formsubtaboff"><a href="#" id="getlogasfile" class="formsubtabtext formsubtabtextoff"><span style="text-decoration:underline">G</span>et Log As File</a><span id="breakpointslnkdot" class="uir-tab-content-dot formsubtabtext formsubtabtextoff" style="display: none;"> </span></td>');

    jQuery("#getlogasfile").click(function() {
        var console_data = '';

        jQuery("table[id^=console] tr:nth-child(2) td:nth-child(2)").each(function( index ) {
            console_data += $( this ).innerText;
            console_data += "\r\n";
        });
        var blob=new Blob([console_data], {type: 'text/plain'});
        var link=document.createElement('a');
        link.href=window.URL.createObjectURL(blob);
        link.download= "NSDebuggerLog-"+ jQuery.now() + ".txt"; link.click();
    });
})();