Bug 1003911 - Part 1: Don't try to extract null favicons from the database. r=margaret, a=sledru
Bug 1003911 - Part 2: Don't write null favicons or thumbnails into the DB. r=margaret, a=sledru
Bug 994712 - Fix CART regression caused by switch to Promise.jsm for Task.jsm. r=mconley, a=sledru
Bug 1002277 - TopmostJitActivationCompartment is not defined on non-ion builds. r=bhackett, a=sledru