I've just noticed an "urgent" video from ThioJoe warning of a zero-day exploit CURRENTLY being exploited. He advises anybody using Chromium-based browsers (Chrome/Edge/Brave/Opera, etc) to update immediately, if you haven't already.
Rather than me try to parrot te advice, relevant version numbers etc, just go watch his YT video if in any doubt. It's under 2 mins (just).
https://www.youtube.com/watch?v=v8t4R-8KAKM