I'm using #PassFF with #pass to store my passwords. The login forms used on various sides sometimes break the workflow.

For my issue logging in to #proxmox madduck shared a simple workaround:

Add additional fields to the pass entry to give PassFF hints what to fill where. The additional fields are no secrets nor worth storing, but they push PassFF to filling the credentials into the correct fields.

Installed #PassFF in Firefox on my #Librem5 to use pass from the browser along with the host application needed for it to interface with the #pass script.

Successfully logged into one a few sites.

The add-on seems to work just good on the small screen of the phone.