Back in 2018, Chrome released an update that automatically logged users into the browser if they'd logged into a google. It was done silently and automatically, and it was a pain to log out of. They faced a ton of backlash (
https://www.pcmag.com/news/google-faces-privacy-backlash-ove...) and rolled the feature back, but that was the tipping point for me. I've been a happy Firefox user since