I believe we changed MSVC version when releasing the most recent release 1.0.1.
http://dl.google.com/firebase/sdk/cpp/firebase_cpp_sdk_1.0.1.zip
Could you give it a try with 1.0.1 instead?
Also, you should be aware that even though you should be able to build for Windows (i.e things will link) all our of libraries are stub implementations for desktop. That is they are non-functional for desktop. We provide stub libraries simply to reduce the amount of conditionally compiled code in your application (i.e #ifdefs).
If you want to check out Firebase functionality, try building for iOS or Android.
Cheers,
Stewart