Why do lots of features disappear in Gmails offline mode?
We simply haven’t fully cracked offline mode yet, and so lots of features only “kind of” work – and we didn’t think that would be much fun for anyone 🙂 We’re working on full offline support, but it might take a while. Please note that it only stops working when in ‘Unstable Mode’, you can have Offline mode activated, but do not use Unstable Mode.