How to block AI-generated websites in your browser

If you want to block AI-generated websites rather than just hide them in search results, you need something that acts whenever a page loads, however you got there: a link in a message, a redirect, a bookmark. This guide covers three ways to do that, from a two-minute rule to a whole-network blocklist, and the gap they all share.

1. uBlock Origin: block builder domains in one browser

uBlock Origin is a free, open-source content blocker, available in full for Firefox. (Chrome now only supports uBlock Origin Lite, which handles custom rules differently, so Chrome users may prefer the DNS option below.) Its My filters tab accepts your own rules. Open the uBlock Origin dashboard, go to My filters, paste these lines and choose Apply changes:

||lovable.app^$document
||lovableproject.com^$document
||bolt.host^$document
||vusercontent.net^$document
||v0.app^$document
||base44.app^$document
||manus.space^$document
||gamma.site^$document

Each rule blocks every page on that domain and its subdomains. When you follow a link to one, uBlock Origin shows a warning page with the option to go through anyway. The domains come from our builder fingerprint guide; add or remove builders to taste.

Leave Replit's and Vercel's domains out unless you're sure: they host a lot of hand-written projects too.

2. DNS blocking: every browser and device

A DNS filtering service decides which domains your devices can reach. Services such as NextDNS, and home setups like Pi-hole, let you add domains to a deny list, usually including all their subdomains. Add the same builder domains as above, and they stop loading in every browser and app on every device that uses that DNS, including phones.

The trade-off is bluntness: there is no "show anyway" button, so you'll need to remove a domain from the list to reach a site you actually want.

3. Hide them in search results too

Blocking stops pages from loading; it doesn't stop them appearing in your results. Pair it with search-side filtering, covered in how to hide AI-generated sites from search results.

The gap: custom domains

Every method above blocks domains. Many AI-built sites move to their own domain, like bloomday-florals.example, as soon as they launch. A domain rule can't see them; you'd need to look at the page itself, its scripts, headers and template leftovers, to know how it was made. That is what how to tell if a website was made with AI explains by hand.

4. A browser that judges each page

Kitsuvo, our no-AI web browser, does the page-level check for you. With Block AI sites on, which is the default:

• Pages that look AI-built are held behind a short notice, whether they're on a builder's domain or a custom one.
• The notice shows the score, the builder when it's known, and the evidence, with Show this site anyway one click away.
• Likely AI-built results are filtered out of Google, Bing and DuckDuckGo searches.

Detection runs on your own computer, so nothing about the pages you visit leaves it.

Which to use

Method	Scope	Custom domains	Way through
uBlock Origin rules	One browser	No	Yes, per visit
DNS deny list	Every device on the network	No	Edit the list
Kitsuvo Block AI sites	Kitsuvo	Yes, when there is evidence	Yes, per visit

They also combine well: a DNS list for phones and other devices, and Kitsuvo on your computer.