GIVE ANOTHER UPDATE: people should take a look at the new AngularFire project ( https://github.com/angular/angularfire2 and https://angularfire2.com/api/ ), which is currently in beta. This module takes care of the many problems that everyone faces.
Take a look at the jeffbcross typings.json file. This is where the compiler gets the "firebase" link.
UPDATE: In the case of this repo, the original author has a script specified in package.json named "install_typings" that can be called using:
npm run install_typings
This will install typings , which will help the "Typescript Definition Manager". You can also set typing in the usual way:
npm install typings --global
To install the Firebase definitions, I needed to run this command:
typings install firebase --ambient --save
The result should give you a new folder in the root of the project named "typings" with files and folders inside.
Hope this helps, given that it was hard for me to get any of Angular 2 with Firebase examples. The one with which I had the best success was r-park todo-angular2-firebase repo.
Good luck.
Leif wells
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