Gboard with every connection blocked through Rethink Firewall except for “media.tenor.com” and “tenor.googleapis.com” (because GIFs are cool).

How can I specifically do this?

F-droid doesn‘t accept the Proton Mail client due to integrated google notification framework. The APK however is available on protonapps.com.

Proton is currently rewritting the Android application completely.

I hope us linux users would get some love. :/