Firefox Multi-Account Containers

Firefox Multi-Account Containers is Mozilla's extension for splitting your browsing into colour-coded tabs. Each container has its own cookies and site storage, so a cookie set in one is invisible to the others. That lets you stay signed in to a work and a personal account on the same site, or keep a social network away from the sites you read.

You create containers for the parts of your life you want apart, such as work, shopping and banking, and long-pressing the new tab button opens a container tab. If you subscribe to Mozilla VPN, you can also link a container to it, so one container browses from a different location.

Be clear about what it does not do. Mozilla's listing does not claim that containers hide your IP address or defeat fingerprinting, so treat it as isolation, not anonymity. It asks for broad permissions, including your browsing history and data on all websites, and the developer states it does not require data collection, which is a claim, not an audit. It only exists on Firefox and takes a little habit to use well. If you use Firefox and have more than one identity online, install it, and pair it with a tracker blocker.