It's Malwarebytes Premium (paid version), not the browser, that is throwing up the warnings, does it on my PC with Firefox and 'erself's PC on Edge which has never used the forum before.

Firefox debugger shows an external script

https://new2-sport-news.com/ttwebsite.js  (dashes inserted to prevent the link working)

on new2sportnews being run close to the menu bar after PM's. at the top of the page on the forum

I've downloaded that script from new2sportnews but don't know enough javascript to know what it does for certain, but it does appear to replace things!!

External script could do anything when run on your PC so I find this very worrying but safe in the knowledge that Malwarebyes Premium is stopping it running on my PC

Malwarebytes also stops direct loading of the new2sportnews site as being unsafe.

Wish someone were about with access to the forum code to prove I'm worried about nothing