If there is a complex web site that you use frequently, you may be able to simplify your work using web browser extensions! In this presentation I will describe a few types of browser extensions (including OpenSearch and GreaseMonkey), and give examples of how I have used them to speed up (and otherwise improve) Voyager on the web for cataloging staff, all without needing any special server access. Similar methods could be used for other web-based systems, such as Primo and Alma.