There is a lot of personal data up for grabs as part of a user's browser data. This can include browsing history, device information, an IP address etc that creates a digital fingerprint of a user for targeting (also known as browser fingerprinting), all the way through to login credentials and sensitive auto-fill information. Even a private browser may still store a lot of this information, which is why it's essential for teams to layer security in order to protect company data.