ColisExpat is a subscription-based add-on for Firefox, designed to enhance the international shopping experience on platforms like Amazon and Shein. The service allows users to receive their orders at a designated ColisExpat address, simplifying the process of international parcel forwarding. As of now, the add-on has been discontinued, with a shift towards the Off Tax service, which users find more useful for managing their international purchases.

The core functionality of ColisExpat focused on providing a seamless way to handle shipping from popular e-commerce sites. Although the add-on and private shop have been closed, users can still utilize the manual Off Tax solution for their orders. This transition reflects the changing dynamics of online shopping and user preferences, ensuring that ColisExpat continues to cater to the needs of international shoppers.