537,583 records for the Church of England in Essex, both Parish Registers and Bishops’ Transcripts, are now on FamilySearch here.
There are a couple of issues that need improvement.
While the description informs that "the collection includes indexes and images of parish registers containing christening, marriage and burial entries," none of the records I checked included images of the original.
Also I could find no way to select just one event, say a marriage, if the whole collection is specified. While you can search for the marriage of John Smith in Barking, Essex, you can't do so for a John Smith marriage in all of Essex.