This add-on supports the SafeInCloud Password Manager which is available by affordable on-time payment for iOS & macOS. It works just fine and integrates into both OS very good. Autofill is supported. I also like that I can keep its database on my private nextcloud server and not only on Dropbox or other us services. The only thing I could think of to be improved would be a login sync between macOS App and the browser add-on, so one would not have to login to both but only one.