A VPN extension can be installed for most web browsers, such as Google Chrome and Firefox, and some browsers such as Opera even come with a built-in VPN extension. The extensions make it easy for users to quickly operate and configure a VPN connection while browsing the Internet. But a VPN connection is only valid for information that is shared in this browser, as use on other browsers and other Internet uses outside of the browser (such as online gaming) cannot be encrypted by this VPN connection.

Although browser extensions are not quite as comprehensive as VPN clients, they can be a convenient option for occasional internet users who want an extra layer of security on the internet. But research has shown that they are more prone to breakouts. Users are also advised to choose a popular extension, as data harvesters may try to use fake VPN extensions. Data harvesting is the process of collecting personal data, such as what marketing experts do to create a personal profile for you, so that advertising content is personalized for you.