# Precision Site Blocker

> Block access to specific websites with a custom domain list.

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

## Overview

- **ID:** `precision-site-blocker`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** F168
- **Category:** privacy-security
- **Version:** 2.0
- **Last updated:** 2024-12-16
- **First published:** 2024-12-16
- **Size:** 20 KB
- **Data as of:** 2026-09-12
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/precision-site-blocker/)

## Description

Precision Site Blocker lets you take charge of your browsing by blocking access to specific websites based on a user-defined list. Whether for productivity, security, or personal preference, this extension ensures you stay in control.

*** How to Use:
- Navigate to about:addons and open the preferences for Precision Site Blocker.
- Add the hostnames you want to block in the provided text box, placing each on a new line.
- The matching system is precise: hostnames must match exactly. For example, "<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/c5b0d8d41c0ee81329d0959b2ab8fa1d4d748e360155177c5d8df80f1466d9b1/http%3A//example.org" rel="nofollow">example.org</a>" will be blocked, but "<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/629776c601b77527401e20665a63909581715f8bea983696bce95bd60e71a699/http%3A//www.example.org" rel="nofollow">www.example.org</a>" won’t, unless you explicitly add it to the list.

Enjoy a cleaner, distraction-free browsing experience with the flexibility to define your own rules. Perfect for enhancing focus, managing access, or tailoring your web usage.

## Rankings

- #131,253 — Overall

## Permissions and access

### Permissions

- `proxy`
- `storage`
- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- 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).

## Similar extensions and apps

- [Site Blocker Pro](https://chrome-stats.com/d/site-blocker-pro) — 1 users
- [Website Blocker](https://chrome-stats.com/d/website-blocker-by-sleekaddons) — 5 users
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- [Privacy Focused Site Blocker (by Avrodh.com)](https://chrome-stats.com/d/avrodh) — 534 users, 4.78 / 5
- [Block these URLs, Domains or Keywords](https://chrome-stats.com/d/block-urls-domains-keywords) — 35 users, 4.50 / 5
- [Website Blocker](https://chrome-stats.com/d/website-blockereres)
- [Block Site](https://chrome-stats.com/d/block-site-2) — 5,622 users, 3.80 / 5
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- [Privacy Focused Website Blocker (by Avrodh.com)](https://chrome-stats.com/d/avrodh-site-blocker) — 392 users, 4.83 / 5
- [Block Websites](https://chrome-stats.com/d/block-websites) — 27 users
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- [ProxyBlocker](https://chrome-stats.com/d/proxyblocker)

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