Right now Firefox doen’t detect the Triton login page as a login page, and for that reason doesn’t ask to save your password.
It would be nice if this could be looked into. It allows for easy syncing of passwords between devices.
I just has a quick look into this and unfortunately its not an easy fix. The form has to exist on the page and not be constructed using javaScript. Everything in Triton is constructed using JavaScript.
A quick workaround could be offering an alternative login page?