Can I avoid being prompted to sign in to every single Stack Exchange site, and having to type and save passwords multiply in the browser? The same login/password seems to work. Is there a Stack Exchange-wide login option, other then Google and Facebook? I've seen an official-looking page about global auto-login, but obviously it's not happening (using Firefox).
I do have Firefox / Privacy & Security / Enhanced Tracking Protection / Strict, which warns about "Cross-site tracking cookies". I also delete cookies on every browser exit. Most of the time, when I try to Ask, I'm being prompted to login (in the same session, for every site). But not every time.
