Just to provide further details: 
I get a notification from my security system 3 times every time I open site - 
18.02.2020 16.01.51    Blocked an advertisement website or a URL that can be used by criminals to damage your computer or personal data    http://besti.ga/    Object: http://besti.ga/    Object type: URL    Application: Firefox    Time: 18/02/2020 16:01
Edit: Sorry after paying more attention it is 3 times everytime I move to a new sub forum