Based on results from local testing, block access to container manager service in the WebContent process sandbox.
Created attachment 446539 [details] Patch
Created attachment 446543 [details] Patch
<rdar://problem/86269784>
Created attachment 446580 [details] Patch
Comment on attachment 446580 [details] Patch r=me
Comment on attachment 446580 [details] Patch Thanks for reviewing!
Committed r286865 (245096@main): <https://commits.webkit.org/245096@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 446580 [details].