Yes. Until mousewheel simulation is provided by `event-simulate` ([ticket #2532389](https://yuilibrary.com/projects/yui3/ticket/2532389)), it is only supported for WebKit via a function local to [scrollview-base-unit-test.html#557](https://github.com/yui/yui3/blob/b09276f7dfd076d8881c11d76612b38c993a7a09/src/scrollview/tests/unit/scrollview-base-unit-test.html#L557).