Although I'yet to update to Catalina macOS 10.15, there is a new Trojan out that seems aimed at it. Not sure why it would not affect other OS versions, however. It is yet another attempt to use the notorious Flash app to continue its abuse of computer uesers.
Apple Insider: New Mac malware uses 'novel' tactic to bypass macOS Catalina security (https://appleinsider.com/articles/20/06/18/new-mac-malware-uses-novel-tactic-to-bypass-macos-catalina-security)
Just another reason to stop using Google, also. The more we use other search engines (DuckDuckGo, etc.), the sooner they become even better.
Anyone know of a site that still requires Flush?