Vista users need Firefox support for Norton Vault

When Chrome support for Vista ends in April, I'll no longer have a supported browser on my Vista pc able to use Norton Vault. Untill (if ever) Norton vault works with Firefox.

I have other Win 10 pc's but some useful old hardware and software needs Vista, it will be inconvenient and what about those without other pc's?

All my pc's are using Norton Security. Can we have more urgency on getting Norton Vault working in FF?