What Is uBlacklist?

uBlacklist is a browser extension that filters search results by hiding sites you don't want to see. It works on Chrome, Firefox, Edge, and Safari, and is maintained by Group-Leafy. If you keep running into the same low-value domains in Google results and want them gone without switching search engines, this is the tool for the job.

What it actually does

The extension operates on the results page itself. Rather than changing how the search engine ranks pages, it removes or marks entries after they load.

• Block unwanted sites — completely hide specified domains from search results.
• Block by URL — use match patterns or regular expressions to target specific paths, not just whole domains.
• Block by title — use regular expressions against result titles, useful when the same content farm reappears under rotating domains.
• Highlight preferred sites — visually mark results from domains you trust so they stand out.

Where it works

Beyond Google Search, uBlacklist supports Bing, Brave, DuckDuckGo, Ecosia, SearXNG, Startpage.com, Yahoo! JAPAN, and Yandex. That matters if you mix engines or use a privacy-focused one as your default.

Rulesets and sync

You don't have to build a blocklist from scratch. uBlacklist can subscribe to public rulesets, which are maintained collections of blocked domains you can enable in one step. You can also synchronize rulesets across devices through Google Drive, Dropbox, OneDrive, WebDAV, or browser sync, so the same filters follow you between machines.

When it's the right fit

Use uBlacklist if:

• You want to clean up search results without leaving your current search engine.
• You need per-URL or per-title control, not just domain-level blocking.
• You work across multiple browsers or devices and want one consistent ruleset.

Skip it if your problem is ranking quality rather than specific unwanted domains — uBlacklist hides sites, it doesn't reorder or improve results you do want to see.