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CatBlock

getcatblock.comBrowser DevTools & extensions

PulseGate's liveness check found it on 14 Sep 2026; it is registered on Firefox Add-ons and has been in the index since 14 Sep 2026. How this is checked

CatBlock is an open-source browser extension based on AdBlock that blocks online advertisements and replaces them with pictures of cats or user-selected images. It supports desktop versions of Chrome, Opera, and Firefox.

Inferred · not functionally tested

Open SourceWebEmbeddablemacOSWindowsLinux
CatBlock preview
Visit getcatblock.com

Overview

6 features

Purpose: Blocking online advertisements while replacing them with customizable images.

Inferred · not functionally tested

Audience: desktop web browser users who want ad blocking with customizable replacement images

Inferred · not functionally tested

Functions: Unknown

Interfaces: API: unknown · MCP: unknown · CLI: unknown · Self-hosting: unknown

Recorded constraints: pricing: open_source · license: Open Source · platforms: WEB · deployment: browser, embeddable, macos, windows, linux

Constraint provenance is unknown; confirm requirements with the publisher.

Record sources: getcatblock.com · addons.mozilla.org. These links do not verify the individual claims.

In the Browser DevTools & extensions space, CatBlock takes a focused approach. Inferred · not functionally tested: It focuses on blocking online advertisements while replacing them with customizable images. Inferred · not functionally tested: CatBlock is an open-source project aimed at desktop web browser users who want ad blocking with customizable replacement images. Basis unknown · not verified: The project is open source (Open Source). Basis unknown · not verified: CatBlock is available on the web, embeddable surfaces, macOS, Windows, and Linux.

Behind CatBlock is CatBlock contributors, and it first shipped in 2016. Inferred · not functionally tested: Key capabilities include ad blocking, cat image replacement, and custom image sets.

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

Tasks: Inferred · not functionally tested

  • Ad blocking
  • Cat image replacement
  • Custom image sets
  • Flickr image sources
  • Chrome support
  • Firefox support

Topics: Inferred · not functionally tested

Tags
ad-blockerbrowser-extensioncustom-ad-replacementcat-images

JSON profile · Text profile · Access guide

Built with & integrations

Connectors
githubdiscord
Runs on
BrowserEmbeddablemacOSWindowsLinux

Trust & compliance

License
Open Source
Public signals
HTTPSPrivacy PolicyOpen SourceFree tierStore listing found
Legal
Privacy Policy

Indexing history

1

What PulseGate has recorded for this listing

  1. Indexed14 Sep · 03:01 UTC
    CatBlock seen via Firefox Add-ons
    Source: Firefox Add-ons · Open

Frequently asked questions about CatBlock

What is CatBlock?
Inferred · not functionally tested: CatBlock focuses on blocking online advertisements while replacing them with customizable images. It is catalogued under Browser DevTools & extensions on PulseGate.
Who is CatBlock for?
Inferred · not functionally tested: CatBlock is an open-source project built for desktop web browser users who want ad blocking with customizable replacement images.
Does CatBlock have a free plan?
Basis unknown · not verified: Yes — CatBlock is open source under the Open Source license and free to use.
What platforms does CatBlock run on?
Basis unknown · not verified: CatBlock runs on the web, embeddable surfaces, macOS, Windows, and Linux.
Is CatBlock still active?
PulseGate's liveness check found it on 14 Sep 2026.
What projects are similar to CatBlock?
Similar projects tracked by PulseGate include CatBlock, AwwBlock, and Catifier.CatBlockAwwBlockCatifier
Who makes CatBlock?
CatBlock is developed by CatBlock contributors.
When did CatBlock launch?
CatBlock first shipped in 2016.

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