Many tech websites today are reporting a flaw in the Apple Safari web browser which allows it to open databases other than one controlled by a particular wesbite. The vulnerability would allow an attacker to look at Google account activity unknown to the visitor.
For example Lifehacker reports the problem here in an article today by Jake Peterson. It refers to a test site called Safari Leaks from FingerprintJS. If you go to that site, Trend Micro will block the site as dangerous (I guess it allows you to experiment).
Here is a similar story on Jioforme by Adam Bairstow.
The articles encourage users to be cautious using Safari right now on any Mac, either iOS on a smart phone or even on a MacBook.
(Posted Wednesday, January 9, 2019 at 6 PM by John W Boushka)