OK so this just happened to me. I have a Mozilla account since I was using their Monitor and VPN service. Last year I canceled those subscriptions because it wasn’t really working for me. Today I start up Firefox and I was signed in to my Mozilla account! I never signed in through Firefox. They’re sus now.
I had a weird thing, I abandoned a reddit account after a 3 day ban over a month back. I cleared the cookies, presumed it was logged out. Cleared all cookies, cache, history, all of that like 20 times, and after clicking on a few reddit posts as search results to get links to streaming shows, I noticed it had me logged in somehow.
I never even set it up to automatically log me in, or even fill in my username. I had to type in my username and then select my password from the manager by hand.
How is it it apparently kept me logged in for a month, or at least every time I found a reddit thread on a search engine and clicked on it? Am I hacked?