Containerise is a Firefox extension designed to enhance privacy and organization by automatically opening specified websites in designated containers. Users can easily configure the extension using a simple CSV format to map multiple domains and subdomains to specific containers, ensuring a streamlined browsing experience. This feature is particularly useful for those who frequently manage multiple accounts or wish to separate their online activities for better privacy.

The extension supports various mapping techniques, including basic domain mapping, glob patterns for subdomains, and regex for more complex configurations. Notably, the extension disables this automatic behavior in private browsing mode, allowing for flexibility in user preferences. With its subscription-based model, Containerise offers a practical solution for Firefox users looking to personalize their web experience.