After completing the single-field form, by clicking ≡ at the bottom of the extension's sidebar, the Save Webform option does not exist in the opened menu. It seems the Enpass Password Keeper does not identify or recognize the single-field form. For example, when we want to track a parcel, we should enter a tracking code in a single-field form like the followng web page relating to a Courier Service Company:
https://www.pdexp.com/en
The version of my Enpass Password Keeper is 6.8.5 (1239) installed on Windows 7.