Use always by default, since it currently provides the best experience in most of the cases with async scrolling enabled.
Created attachment 444956 [details]
Thanks for the patch. If this patch contains new public API please make sure it follows the guidelines for new WebKit2 GTK+ API. See https://trac.webkit.org/wiki/WebKitGTK/AddingNewWebKit2API
Created attachment 444957 [details]
Comment on attachment 444957 [details]
If there are problems, we can always just switch it back.
Committed r286130 (244517@main): <https://commits.webkit.org/244517@main>