Hey gunk_mail, There are a lot of benefits to running the latest version of Firefox. What exactly are you not liking about the new version? If it is just that things have moved around a bit, you should take a look at this article with [https://support.mozilla.com/en-US/kb/common-questions-after-upgrading-firefox-36 common questions after upgrading]. It will show you how to get a more familiar look for Firefox. If you still want to roll back to a previous version of Firefox, just take a look at the Knowledge Base article [[Installing a previous version of Firefox]]. Hopefully this helps!