# Block Unicode domains

> To protect users from URL spoofing, issue a warning if the domain string is Unicode.

Canonical page: [https://chrome-stats.com/d/block-unicode-domains](https://chrome-stats.com/d/block-unicode-domains)

## Overview

- **ID:** `block-unicode-domains`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Catshelf
- **Category:** privacy-security
- **Daily users:** 5
- **Version:** 1.0.1
- **Last updated:** 2022-11-21
- **First published:** 2022-11-19
- **Size:** 26 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/block-unicode-domains/)
- **Website:** [https://github.com/catshelf/BUd](https://github.com/catshelf/BUd)

## Description

Block Unicode domains is a Firefox add-on designed to protect users from URL spoofing. It detects and blocks domains with Unicode characters and displays a 'BLK' badge. Users can temporarily disable the block by clicking the icon, which shows an 'Off' badge for one minute. After one minute, the block automatically restarts to prevent forgetting to reactivate it.

## Rankings

- #44,410 — Overall
- #87 — domain
- #195 — malware

## Permissions and access

### Permissions

- `*://*/*`
- `webRequest`
- `webRequestBlocking`
- `alarms`

## 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).

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Source: [Chrome-Stats](https://chrome-stats.com/d/block-unicode-domains)