# ATO Blocker

> A super minimal blocker of ads, trackers and annoyances which works out of the box. Compared to most other extensions, it does not require (or offer) any configuration options and "just works".

Canonical page: [https://chrome-stats.com/d/ato-blocker](https://chrome-stats.com/d/ato-blocker)

## Overview

- **ID:** `ato-blocker`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** remusao
- **Category:** privacy-security
- **Daily users:** 1
- **Rating:** 5.00 / 5 (4 ratings)
- **Version:** 1.1.1
- **Last updated:** 2021-02-21
- **First published:** 2020-05-11
- **Size:** 2.40 MB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/ato-blocker/)
- **Website:** [https://github.com/remusao/blockrz/issues](https://github.com/remusao/blockrz/issues)

## Description

ATO Blocker is a super minimal Firefox add-on that effectively blocks ads, trackers, and annoyances. It does not require any configuration and offers a fast loading time with a small memory and CPU footprint. The add-on uses a set of stable and widely used filters lists to ensure reliable blocking.

## Rankings

- #71,289 — Overall

## Permissions and access

### Permissions

- `webRequest`
- `webRequestBlocking`
- `webNavigation`
- `tabs`
- `<all_urls>`
- `storage`
- `unlimitedStorage`

### Content script matches

- `*`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/ato-blocker)