Within 24 hours this weekend I was notified by my anti virus application (Avast) that they are no longer supporting Firefox browser (to concentrate on Outlook and Chrome), and a political news website that I frequent (Meidas) blocked me with a "captcha" type puzzle. The website said my browser was mimicking robot or bot use. I was presented with a puzzle requiring me to slide a tab rightward. It repeatedly told me I had slid the tab incorrectly. I believe all of this happened after an update of Firefox about the middle of last week.