Hi @[deleted]
Firefox and Chrome plugins aleady exists for autofilling passwords
see here
https://github.com/itflow-org/itflow-chrome
and here
https://github.com/itflow-org/itflow-firefox
Although they are very much still beta and we haven't worked on them lately do to other priorities
Here is documentation on it from our legacy docs site
https://legacy.itflow.org/docs/?doc=logins
We have already implemented vendor templates which can be found setting > Vendor Templates
Vendor Templates can be added to any client and then updated via the template itself.