You are probably familiar with browser extensions, which most of us use on a daily basis. For example, extensions are used to block ads on Web pages, translate text from one language to another, or add a coupon code like Honey. There are hundreds or even thousands of them, for productivity, customization, shopping, games, and more. A browser extension is something like a plugin for your browser that adds certain functions and features to it. Extensions can modify the user interface or add some Web service functionality to your browser.