# ffprofanity

> Mute profanity and display censored subtitles while watching videos. All processing is done locally to protect your privacy.

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

## Overview

- **ID:** `ffprofanity`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** lggcs
- **Category:** appearance,language-support,photos-music-videos
- **Daily users:** 10
- **Weekly downloads:** 1
- **Version:** 1.3.0
- **Last updated:** 2026-08-17
- **First published:** 2026-04-09
- **Size:** 146 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/ffprofanity/)
- **Website:** [https://github.com/lggcs/ffprofanity](https://github.com/lggcs/ffprofanity)

## Description

Profanity Filter mutes video audio and displays censored subtitles whenever profanity is detected during playback. You can upload SRT, ASS, or WebVTT subtitle files, or rely on automatic subtitle detection on supported sites like YouTube and Jellyfin.

A high‑precision subtitle overlay renders at the video’s frame rate and offers full customization—font size, color, opacity, and on‑screen position. You can adjust timing with an offset slider or keyboard shortcuts, preview upcoming cues, and enable a profanity‑only mode to hide clean lines. All processing happens locally in your browser, ensuring no data ever leaves your device.

Profanity detection uses exact matching, regex‑based obfuscation patterns, and fuzzy Levenshtein matching with adjustable sensitivity. Censored words can appear as “[CENSORED]” or be replaced with playful alternatives such as “Silly,” “Polite,” “Random,” a monkey emoji, or your own custom mappings.

## Rankings

- #33,849 — Overall
- #10 — gofa
- #219 — process

## Permissions and access

### Permissions

- `tabs`
- `storage`
- `activeTab`
- `webNavigation`
- `webRequest`
- `declarativeNetRequest`
- `scripting`

### Host permissions

- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Very high risk impact
- **Risk likelihood:** High 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 was recently updated in the past month. New updates 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

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- [Vulguard: Video Profanity Filter](https://chrome-stats.com/d/vulguard-profanity-filter) — 35 users, 4.00 / 5
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Source: [Chrome-Stats](https://chrome-stats.com/d/ffprofanity)