It's sad to see a simple password manager go. Even if it's integrated inside Firefox most users will probably look elsewhere (Bitwarden, Keepass). I use the later, the file db works great and its easy to move between devices when needed.

Also, donations to Mozilla go to the foundation instead of the corporation. The only way to give them some useful money is paying for the services they sell like the VPN service (but also don't forget that Mozilla is just a Mullvad reseller).