What platforms does Replacing uMatrix. run on?

Replacing uMatrix. runs on the web and embeddable surfaces.

Is Replacing uMatrix. still maintained?

PulseGate's liveness checks currently classify Replacing uMatrix. as active.

What are alternatives to Replacing uMatrix.?

Similar tools tracked by PulseGate include Element Remover, McPixel 3, and Matrix Calculator.

Is Replacing uMatrix. open source?

Replacing uMatrix. has a public GitHub repository.

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Replacing uMatrix.

cmpxchg8b.comDeveloper Tools

A blog post discussing the replacement of the uMatrix Chrome extension.

GPL-3.0

WebEmbeddable

Visit cmpxchg8b.com

4.7k

stars

488

forks

2014

since

Overview

Replacing uMatrix. is a Developer Tools product. The product ships for the web and embeddable surfaces.

Replacing uMatrix. first shipped in 2014. The GitHub repository has been archived.

Built with & integrations

Runs on: BrowserEmbeddable

Trust & compliance

LicenseGPL-3.0

Verified signals

HTTPS GitHub · ★ 4.7k Store-verified publisher

Recent events

Latest indexed changes and source events

IndexedJun 17, 11:24 PM
Listing verified by the PulseGate indexer
Source: PulseGate indexerOpen ↗

Frequently asked questions about Replacing uMatrix.

What platforms does Replacing uMatrix. run on?: Replacing uMatrix. runs on the web and embeddable surfaces.
Is Replacing uMatrix. still maintained?: PulseGate's liveness checks currently classify Replacing uMatrix. as active.
What are alternatives to Replacing uMatrix.?: Similar tools tracked by PulseGate include Element Remover, McPixel 3, and Matrix Calculator.Element Remover McPixel 3 Matrix Calculator
When did Replacing uMatrix. launch?: Replacing uMatrix. first shipped in 2014.
Is Replacing uMatrix. open source?: Replacing uMatrix. has a public GitHub repository.

At a glance

Platforms: Web
Languages: English
Open source: Yes · ★ 4.7k · archived
License: GPL-3.0
First seen: Dec 26, 2023
Activity: 🟢 Active

Developer

Gorhill

Community-driven

GitHub

Open source

View on GitHub →

⚠ Archived

⭐ Stars: 4,681
🍴 Forks: 488
Open issues: 66
Last commit: 5y ago
Commits 90d: 0
Contributors: 38
Authorship: Community-driven
Default branch: master
Latest release: 1.4.4 · 5y ago

Live coverage

Confidence: High · 97
Indexed: Jun 17, 2026
Lifecycle: Alive
Activity: Active
First seen: Dec 2023
Last seen: 1mo ago

Identity audit (9)

Entity ID: cmqipa9600acskuz5gp6rnk8f
Slug: ublock-origin-lite-cmpxchg8b-com
Verification state: Indexed for public listing
Claim / listing state: Unclaimed · listed: yes
Index status: Included in index
Latest evidence snapshot: Jun 18, 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Last updated: Jun 18, 2026
Canonical URL: https://lock.cmpxchg8b.com/umatrix.html

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