I don’t use the sync functions on browsers anyway, so it’s of no consequence. Privacy wise, Brave is already built on top of degoogled chrome and the fingerprinting resistance of LibreWolf and the Tor Browser derived Mullvad Browser is too good not to use when possible. I haven’t vetted any Firefox based browsers for Android yet as I have done with LibreWolf and Mullvad Browser for desktop, and Brave integrates really well with Android - as in, the user experience is great - so… XD