Beta got the green light! Looks like we’re shipping to release!
Made some forward progress with some fairly rube-goldbergy architecture to marshall stuff between io thread, favicon service and the main thread. But we got something that ultimately builds. But crashed when used. Trying to use a nsMainThreadPtrHandle instead because maybe that’s better. ?! Could really use some help, maybe from our Media team which definitely uses MozPromises a lot.
TODO: Talk to Media team about the right way of doing this.