Manual (forced) saving of login and form fields - possible?

Is there a button or menu item or keyboard shortcut that will manually save / update a login form? Surely this is a more basic feature than the “Do you want to save this?” prompt that (usually) comes up automatically when you login to a new website.

Not that I remeber/used/know.

Here is a first steps video of the browser extension, Alsom in this FAQ entry, you can review the keyboard shortcuts for major browsers.

I would love to have this feature, when a new login isn’t detected automatically !