Who is Site Blocker for?

Site Blocker is a consumer product built for firefox users who want simple website blocking and focus controls.

Is Site Blocker free?

Yes — Site Blocker is free to use.

What platforms does Site Blocker run on?

Site Blocker runs on the web and embeddable surfaces.

Is Site Blocker still active?

Unverified. Site Blocker has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What are alternatives to Site Blocker?

Similar projects tracked by PulseGate include Site Blocker, Simple Site Blocker, and Website Blocker.

Who develops Site Blocker?

Site Blocker is developed by Prash.

When did Site Blocker launch?

Site Blocker first shipped in 2016.

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Site Blocker

Name: Site Blocker
Author: Prash

mozilla.orgBrowser DevTools & extensions

Site Blocker is a Firefox extension that blocks websites listed by the user and redirects blocked pages to a configurable URL. It supports comma-separated or line-separated site lists, whitelist entries, and an enable/disable toggle.

FreeWebEmbeddable

Visit mozilla.org

4alternatives

6features

2016since

Overview

6 features

Site Blocker is a Browser DevTools & extensions project. It focuses on blocking distracting or unwanted websites while allowing selected sites and controlling where blocked pages redirect. Site Blocker is a consumer product aimed at firefox users who want simple website blocking and focus controls. Site Blocker costs nothing to use. It runs on the web and embeddable surfaces.

Prash builds and maintains Site Blocker, and it first shipped in 2016. Key capabilities include website blocking, custom redirect URL, and whitelist rules. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Website blocking
Custom redirect URL
Whitelist rules
Enable/disable toggle
Browser action button
Multi-line site lists

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed19 Sep · 05:31 UTC
Site Blocker verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Site Blocker

What does Site Blocker do?: Site Blocker focuses on blocking distracting or unwanted websites while allowing selected sites and controlling where blocked pages redirect. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is Site Blocker for?: Site Blocker is a consumer product built for firefox users who want simple website blocking and focus controls.
Is Site Blocker free?: Yes — Site Blocker is free to use.
What platforms does Site Blocker run on?: Site Blocker runs on the web and embeddable surfaces.
Is Site Blocker still active?: Unverified. Site Blocker has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What are alternatives to Site Blocker?: Similar projects tracked by PulseGate include Site Blocker, Simple Site Blocker, and Website Blocker.Site Blocker Simple Site Blocker Website Blocker
Who develops Site Blocker?: Site Blocker is developed by Prash.
When did Site Blocker launch?: Site Blocker first shipped in 2016.

At a glance

Pricing: Free
Platforms: Web
First seen: 19 Sept 2026
Built for: Firefox users who want simple website blocking and focus controls
Model: B2C
Solves: Blocking distracting or unwanted websites while allowing selected sites and controlling where blocked pages redirect.

Registered as

Firefox Add-ons: site-blocker

Developer

Prash

Index record

Indexed: 19 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 19 Sep 2026

Identity audit (13)

Slug: site-blocker-mozilla-org-1lkw4u
Lifecycle state recorded: 19 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 19 Sept 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 19 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/site-blocker

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