Started on 5/29/2021. Would not let me login to my yahoo email account and then flashed some bogus help screens that would not work. I even call yahoo and could not trust their foreign help agent from who knows where. I've been a FireFox customer for 20 years or more. I went on Chrome, and Edge and my email came right up when I logged in. It looks like I may have to cancel out FireFox and use a better browser, unless Firefox can fix this problem overnite. and even then I would be skeptical of FireFox's capabilities in the future.