The term “plug-in” (also “plugin”) comes – as do so many terms from the digital universe – from the English-speaking world. The English verb “to plug in”, means to insert or to connect, for example to insert a connector or connect a device to an electrical supply. In the digital context it refers to a software extension which augments existing software programs. For example, these additional modules extend browsers such as Internet Explorer, Firefox and Google Chrome – so that users can adapt their programs better to their own specific needs. However, browser plugins are often thought to represent gaps in security: if weak points exist, hackers can overcome the security mechanisms of the web browser. IT experts therefore recommend regular updating of plugins.