Can't get this feature to work. What's the magic answer. Also, I'm always having to re-enter passwords. Privacy mode is and always is turned off. Am very frustrated.
The safer, and almost always functional setting is "Allow From Current Website Only". This prevents (or should prevent) third party websites from plundering information that is stored by other websites; while letting the website you are on do what it needs to operate correctly.
I've never encountered a website that needed "Always Allow", and wouldn't trust one if I did.