Thanks for the link to that video, @wtg. I did have that option enabled, but while I was on that page I noticed at the bottom of the screen it said I'd opted to never save passwords for google and earthlink. I don't remember doing that, but I deleted both sites and it appears that might have been responsible because I use my Google account to log into Disqus.
Ok then, I'm on Brave for another trial run!
eta, it didn't last long. It continues to log me out of Disqus if I so much as refresh the page or open a new tab. Ugh.
eta, I might be on another trial run. If I turn off fingerprinting for that specific website, it seems to behave.