customJavaScriptUserAgentAsSiteSpecificQuirks is no longer needed but we need a variant which sets UA as a part of site specific quirks.
Created attachment 384777 [details] Patch
Comment on attachment 384777 [details] Patch Thank you! This is exactly what I need. r=me
Committed r253090: <https://trac.webkit.org/changeset/253090>
<rdar://problem/57613078>