in firefox > options > privacy > permissions > notifications > settings, you have "Block new requests asking to allow notifications"

There are sites (can't recall now) that show the notification dialog as a layer that somehow beats the browser setting.

The ones I've encountered that appear to bypass Firefox's "no you can't ask" setting are just rendering a mockup of Chrome's, well, chrome over top of the page. It's a pitiful attempt because the UI they're faking looks nothing like the browser I'm actually using (beyond rendering Chrome's UI in a page loaded by Firefox, they'll show Windows OS buttons when I'm using a Mac, or comically they'll do the reverse when Windows is still far and away the most common desktop OS).

Is there something similar in Chrome?

chrome://settings/content/notifications

Change "Ask before sending" -> "Blocked"

I made one for you - https://chrome.google.com/webstore/detail/block-website-noti...