New Features:
A new Experiments section has been added to the Preferences screen. This is intended to bring experimental features such as the new editor early to users for testing and feedback. By @Luc-Mcgrady in #5057
Update to fsrs-rs 6.6.1, bringing performance improvements. By @asukaminato0721 in #4956
An experimental rework of the editor by @abdnh in #4029 can be enabled from Preferences>Experiments. The main goal is to make it possible to integrate the editor into mobile clients. May affect addon compatibility.
