With the introduction of GPU process on macOS, the process needs to be relaunched in order for this to work.
<rdar://problem/117914468>
Pull request: https://github.com/WebKit/WebKit/pull/19966
Committed 270221@main (f8db1385c264): <https://commits.webkit.org/270221@main> Reviewed commits have been landed. Closing PR #19966 and removing active labels.