No OP was right. If the reCaptcha is on the same page as a login, and I use my password manager to fill the fields, I fail the reCaptcha almost every time. I have to manually paste in the user name and password separately to slow things down to act more human…
Yeah this basically sounds like it takes the temporary container add on that I think was folded into Firefox at some point recently and basically just does it behind the scenes now on a per domain basis