We are developing application for Google Playmarket and Amazon AppStore.
It's using several technologies, based on GooglePlayServices:
Firebase Analytics, Firebase Cloud Messaging, Google Chromecast streaming, Google+ Sign In.
We noticed, that Amazon Kindle Tablets havn't installed GooglePlayServices, and it's not exists in Amazon AppStore - so this features are not working
We remade Google plus Sign In to work with custom tabs - so it's now working on Kindle Tablets;
Firebase Analytics looks like working even on Kindle Tablets;
But we can't find some solution, how to force Firebase Cloud Messaging and Google Chromecast work on Kindle Tablets.
Perhaps, Amazon just don't support this technologies at all, and we have to remake it to some Amazon's own technologies?
Please, give us know, what are oficial recomendations from Amazon regarding this technologies.