Reddit NSFW Subreddit Blocker

Name: Reddit NSFW Subreddit Blocker
Author: Thunderbolt

By: Thunderbolt Add-on

Automatically blocks NSFW (over-18) subreddits on Reddit. No off-switch, no whitelist — blocking is always on.

Overview

Firefox Add-ons Store

Daily users

6 ▼ 1

Data as of 2026-07-26

Version:

1.0.2

Last updated: 2026-07-18

Features & Capabilities

Reddit NSFW Subreddit Blocker hides NSFW (over-18) subreddits the moment they start loading and replaces them with a blank page, before any adult content can appear.

It is deliberately un-configurable: there is no popup, no options page, no whitelist, and no off-switch. Once installed, blocking is always on — a self-control tool in the spirit of website blockers, scoped to Reddit NSFW subreddits.

How it works: a content script checks each subreddit you open against Reddit's own public NSFW flag (with a page-content fallback) and blocks the ones marked over-18. It uses no blocklist to maintain and sends no data anywhere.

Privacy: collects nothing, tracks nothing, no ads. Requests only Reddit's public subreddit metadata, directly from Reddit. See the privacy policy.

User Growth & Download Statistics

Add-on

By:

Thunderbolt

Daily users:

6 -1

Version:

1.0.2 Last updated: 2026-07-18

Version code:

6362045

Creation date:

2026-06-09

Risk:

Host permissions:

*://*.reddit.com/*

Content scripts matches:

*.reddit.com

Size:

24.66KB

Email:

sh*****@gmail.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-26

Compare stats and ranking:

Ranking

# 40,763 ▼ 2,571

Other rankings

#181 in reddit keyword 48 ▼ 12

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Thunderbolt

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/reddit-nsfw-subreddit-blocker/

Email:

sh*****@gmail.com

Website:

https://github.com/ShreeshaBhat9/reddit-nsfw-blocker

Is Reddit NSFW Subreddit Blocker Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Reddit NSFW Subreddit Blocker requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Request access to the following domains: reddit.com
High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Reddit NSFW Subreddit Blocker is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****