如果你要投Facebook广告，Facbook一般是建议你装Facebook的sdk；如果你要投Google广告，谷歌一般会建议你装Firebase的sdk。

Firebase Cloud Messaging has gained support for token-based authentication for APNs, and the client SDK has received simpler connection and registration logic.

The challenge arose when we began onboarding other game developers, as Firebase didn't offer a direct mechanism to automatically add their applications to our project.