Update Changelog

Author: tmbrbr

addOns/selenium/CHANGELOG.md

@@ -5,7 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
-
+### Added
+- Allow custom browser builders to define preferences
 
 ## [15.45.0] - 2026-03-04
 ### Fixed