A browser extension, also known as a plug-in or add-on, is a software application that enhances the functionality of a web browser. There are a myriad of synonyms for browser extensions, including browser helper objects (BHO), toolbar, widget, module, and plug-in module. BHO is a term related to Internet Explorer, while toolbar generally refers to a browser-wide toolbar that provides numerous functions. Widget is an extension designed to display compact and informative data like weather reports or news feeds. A module is a piece of software that adds capability to a program, and a plug-in module is a compact software component that adds a specific feature to a larger software application.