I was disappointed to learn that your product "F-Secure KEY" did not have a Linux Ubuntu version.
I was thinking of using only your Chrome or Firefox extension under Linux Ubuntu. Unfortunately, the F-Secure KEY extension for Internet browsers requires the installation of your Windows or MAC version software to work. The extension cannot work alone. That's a shame! and this regrettable.
There is no internet version of our passwords. As proposed by Kaspersky Password Manager or Lastpass.