cross-posted from: https://piefed.world/c/ysk/p/1503393/ysk-molly-signal-fork-has-not-been-updated-since-3-months-and-is-vulnerable-to-attacks-f
As of now, Molly lastest release was in 31 July (Version v8.19.2-4).
It contains vulnerabilities that had been simply fixed in mainline Signal.
Take for example the latest exploit disclosed in October, it has been fixed in Signal 8.27. 1. Meanwhile Molly remains vulnerable.
It’s currently recommended to use mainline Signal and delete Molly till they at least return to updating their app adequately, if they ever will.

The APK from Signal’s website doesn’t require Play services, just don’t install Signal via Play Store. DaNgEr ZoNE eye rolls aside:
https://signal.org/android/apk
Annoying, I rather liked Molly.
Use Verified-Apps from PrivacyGuides to verify the signature of the APK before installing.
Before Appverifier was a thing, it was very obscure how to even check that signature.
I’m going go try Signal-FOSS instead that you mentioned earlier.