Wayland, security

Security on Firefox for Android is a significant concern.

No. Ublock Origin Lite

GrapheneOS. Don’t use Firefox on Android

Lemmy itself has encountered numerous cyber attacks.

The server’s trustworthiness does not matter for Signal. The app is designed to work securely regardless of the server. Moreover, even if the server software is open source, you cannot be sure that they run the same code that they publish.

This article shows why your proposals are not secure at all:

https://madaidans-insecurities.github.io/linux.html