Looks like running typings install github:typed-typings/npm-firebase && typings install (see issue would simplify the installation by completely eliminating Step 3 of installation. Also with this different firebase typings, I could also import * as firebase from 'firebase'; without any module not found error. The only downside is that the typings is referring to github until it's pushed to npm.
There's a issue tracking registry now. https://github.com/typings/registry/issues/604
We're going to start shipping the official typings with the Firebase npm module soon, so this will clear up on it's own.
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We're going to start shipping the official typings with the Firebase npm module soon, so this will clear up on it's own.