I tried to install F-Droid (0.91) as system app on Cyanogenmod 12. The installation succeed but after that the F-Droid icon disappears.
Of course i tried to restart more times, i tried also to reinstall F-Droid as standard app from an apk but it crasches when i try to start it... probably for a conflict.
Someone knows if i can try something, i.e. where i can try to find the executable?