Why did the Internet stop working because of Browser-sync?

Question

Browsers

Kind.
I played with the sync browser, turned it on via cmd, then I go in from the phone to see the index, well, you understand, and something doesn’t come in, then I decided to go to localhost: 3000, I go in, even stupid again, then the hop is loaded, and the Rostelecom page - they say the site is blocked! As if Roskomnadzor banned, only this is my local site! And then everything, the Internet began to blunt, disappeared altogether, I spent an hour trying to fix it! I deleted browser sync, globally, from the dev branch, and only after I launched it from another project (another folder) did the Internet work! (+ I played with DNS in the properties, the default was Google dns addresses 8888 - 8844) What kind of nonsense is this? I just wanted to see how the site looks on the phone, but I was not allowed to go to the specified address in browser-sync, in the control panel, 198.168.2:3000,
Right now, I removed DNS altogether, and everything is working fine for the time being, I'm afraid to put Google DNS back, apparently BS got bugged and even did it with the Internet, it emulates all this garbage, apparently even bugged, moreover, when I went into the control panel there was a link only for the computer , and there was no External (for phone)