I've been using it since it was introduced. I no longer think about my passwords. Everytime I register in a new website, I just right-click -> generate secure password, it auto-fills and saves it. One password for every website. Yes, they are stored remotely with Firefox Sync.
Can you use it as a password manager for things that are not websites as well? And is there a way to associate additional data together with the passwords, such as answers to security questions?
Those were the two main things that made me use a separate password manager app in the first place.
No to both of these. There are only three fields, and they must all be filled in: URL, username, password. But suppose your bank is HSBC, you could, make up something like "securityquestion://www.hsbc.com", "mom's name", "Jane Doe".
Sadly it doesn't really support customizing the generation. There have been plenty of sites I've found where the auto-generated password doesn't match requirements of the service.
I just love this browser more and more