Mozilla is moving right along with getting Firefox 41 ready to ship for the September 22nd release. Having had a chance to play with the current Beta version of Firefox 41, here are THREE major changes users should be aware of to avoid headaches upon updating/downloading: New ‘New Tab’ behavior. Gone are the days users could set their preference as to what comes up when they open a new tab via the browser.newtab.url preference in about:config. Nope, that was being ‘exploited’ so Mozilla removed this functionality that has been in Firefox since Firefox 13 (June 2012). There is a simple solution, Custom New…