In Bug 185236 I re-enabled 'nehelper' access to support network extensions. We later discovered that a second mach port, 'nesessionmanager' is also needed.
Created attachment 340995 [details]
Comment on attachment 340995 [details]
Clearing flags on attachment: 340995
Committed r232072: <https://trac.webkit.org/changeset/232072>
All reviewed patches have been landed. Closing bug.