Wild ass comment.
Unless you really really need portability between devices
Who doesn't??? What do you do, copy 20-char randomly generated passwords manually all the time? That's the whole point of password managers...
I use firefox's local, inbuilt manager
Browsers are NOT a secure storage for sensitive data, if you want a local password manager at least please use KeePassXC.
Mullvad already has that. It's called "WireGuard Obfuscation" in the settings. Obscura just seems to have a different implementation based on similar principles.