It has been determined that there is no need to observe preference changes in the domain 'com.apple.Preferences'.
<rdar://70729182>
Created attachment 418720 [details] Patch
Comment on attachment 418720 [details] Patch r=me
Comment on attachment 418720 [details] Patch Thanks for reviewing!
Committed r272072: <https://trac.webkit.org/changeset/272072> All reviewed patches have been landed. Closing bug and clearing flags on attachment 418720 [details].