They are already ahead on their fuel budget due to the accuracy of the Ariane launch process. NASA said it would "significantly" extend the mission lifetime.

They are already ahead on their fuel budget due to the accuracy of the Ariane launch process. NASA said it would "significantly" extend the mission lifetime. https://blogs.nasa.gov/webb/2021/12/29/nasa-says-webbs-excess-fuel-likely-to-extend-its-lifetime-expectations/ https://blogs.nasa.gov/webb/2021/12/29/nasa-says-webbs-exces...