while checking a Broadband speed error Broad band speed dropped from 140mbps to 7mbps I eventually realised it was only on one of my devices And only on Firefox. I cleared the winsock to try to stop throttling, speed went up a bit to 20mbps I assume this is some sort of hack. I did notice an advert coming up when on Yourube saying You are now using a ??? browsec browser Strangely Microsoft Edge works fine & full speed.