suggesting to switch off FW or other security idk man, it's kinda dangerous to do that.
thing is that quite a lot browser-own security measures get their info updates on 'dangerous oir deceptive' through one pool: google cloud. so if anything was flagged SUS by any browser, telemetry about that ends up in the cloud, and many different browsers draw these new infos and then flag sites as dangerous, too, no matter if the problem still exists. stuff tends to linger in that cloud, for months and more.
by now, i think at least uBlock should have some update out..? so if that did trigger, probly update it, might help