superfeedr/indexeddb-backbonejs-adapter — pull request #67 by SonoIo (2014-09-17 16:34:37+00:00)
Title: Added support for idAttribute property of Model

Actually idAttribute is ignored. Save a model that use _id instead of id produces a record with both: id and _id.
It wasn't a problem until I tried to write a dual storage with MongoDB on the server side. Ouch!