Tl;Dr: Extremely satisfied and using on three devices.
The sync server is open source and free, so you can host an instance yourself if you'd like.
Firefox accounts have 2FA support, and passwords are end to end synced anyway, so even if your Firefox account is compromised, nobody can recover data without the key.
For about a decade in the working, there were zero breaches in mozilla AFAIK.
I use Firefox sync in my Windows laptop, Firefox on Android beta. There is also an app called Lockwise that can work as a standalone app and a password fill feature for other apps as well.
The sync server is open source and free, so you can host an instance yourself if you'd like.
Firefox accounts have 2FA support, and passwords are end to end synced anyway, so even if your Firefox account is compromised, nobody can recover data without the key.
For about a decade in the working, there were zero breaches in mozilla AFAIK.
I use Firefox sync in my Windows laptop, Firefox on Android beta. There is also an app called Lockwise that can work as a standalone app and a password fill feature for other apps as well.