Check out https://lockbox.firefox.com/ https://lockbox.firefox.com/, which is an iOS app that syncs with Firefox Sync, and integrates with the iOS 12 password m

Check out https://lockbox.firefox.com/ https://lockbox.firefox.com/, which is an iOS app that syncs with Firefox Sync, and integrates with the iOS 12 password management interface. It doesn't do bookmarks, but it should fulfill part "b)" of your requirements nicely. It's still in Beta according to https://testpilot.firefox.com/experiments/firefox-lockbox https://testpilot.firefox.com/experiments/firefox-lockbox but it works very well for me.