> ## Documentation Index
> Fetch the complete documentation index at: https://docs.browseros.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Ad Blocking

> BrowserOS supports full ad blocking with uBlock Origin

BrowserOS supports full ad blocking through [uBlock Origin](https://ublockorigin.com/), the most powerful open-source ad blocker available — the full extension, not the watered-down "Lite" version.

## Why BrowserOS?

Chrome [killed support](https://developer.chrome.com/docs/extensions/develop/migrate/mv2-deprecation-timeline) for uBlock Origin by phasing out Manifest V2 extensions. The only option left on Chrome is "uBlock Origin Lite," a significantly weaker version that can't use advanced filtering rules.

**BrowserOS re-enabled full Manifest V2 support**, so you can install and run the original uBlock Origin at full power — the same extension Chrome no longer allows.

<Card title="Install uBlock Origin" icon="shield-check" href="https://chromewebstore.google.com/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm">
  Install the full uBlock Origin extension from the Chrome Web Store. Works on BrowserOS out of the box.
</Card>

## BrowserOS vs Chrome

We ran both browsers through [adblock.turtlecute.org](https://adblock.turtlecute.org/), a test that measures how effectively a browser blocks ads and tracking scripts.

<CardGroup cols={2}>
  <Card title="BrowserOS — 68%">
    <img src="https://mintcdn.com/browseros/SQ44qH9ZJeym2Wd9/images/adblock-browseros.png?fit=max&auto=format&n=SQ44qH9ZJeym2Wd9&q=85&s=08cba94f0788c96a05ccd9e43ef507f9" alt="BrowserOS blocking 68% of ads" width="2271" height="1533" data-path="images/adblock-browseros.png" />
  </Card>

  <Card title="Chrome — 7%">
    <img src="https://mintcdn.com/browseros/SQ44qH9ZJeym2Wd9/images/adblock-chrome.png?fit=max&auto=format&n=SQ44qH9ZJeym2Wd9&q=85&s=31016ba1f7540a87a2f6761bc4899922" alt="Chrome blocking only 7% of ads" width="2678" height="1533" data-path="images/adblock-chrome.png" />
  </Card>
</CardGroup>

Out of 133 ad-related requests:

* **BrowserOS** blocked 91 (68%)
* **Chrome** blocked 9 (7%)

That's roughly **10x more protection** with zero configuration.

## What This Means

Fewer ads means faster page loads, less bandwidth usage, and significantly reduced tracking. BrowserOS handles this natively so you can focus on browsing.