I am using BW for Firefox. Just made sure everything is fully up to date (both FF and my BW extension)
For one of my bank websites, https://allybank.com, the username autofill works just fine, but it wont autofill the password.
I think (but not sure, since other people dont seem to be having this issue?) maybe I need to do a custom field, but when I tried that, didnt work; I’m probably using the wrong syntax or something.
In my own testing, both of the suggested custom field names work in Firefox; in Chrome, autofilling works without the need to define any custom fields.
Please post a screenshot of your custom field. It should look like this: