Who should use Certificate Watch?

Certificate Watch is an open-source project built for firefox users concerned about website certificate changes.

What platforms does Certificate Watch run on?

Certificate Watch runs on the web and embeddable surfaces.

Is Certificate Watch still active?

Unverified. Certificate Watch 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 Certificate Watch?

Similar projects tracked by PulseGate include Certificate expiration, Corporate certificate detector, and CertiSafeGuard.

Who makes Certificate Watch?

Certificate Watch is developed by PilzAdam.

How long has Certificate Watch been around?

Certificate Watch first shipped in 2019.

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Certificate Watch

Name: Certificate Watch
Author: PilzAdam

github.comBrowser DevTools & extensions

Certificate Watch is an open-source Firefox add-on that monitors website certificates and warns users when they change. It is intended for Firefox users who want an additional alert when a site's certificate differs from a previously observed certificate.

Open SourceWebEmbeddableCloud-managed

Visit github.com

Overview

4 features

Certificate Watch is a Browser DevTools & extensions project. It focuses on detecting unexpected changes to website security certificates before they go unnoticed. Certificate Watch is an open-source project aimed at firefox users concerned about website certificate changes. Certificate Watch is open source under the Open Source license. Certificate Watch is available on the web and embeddable surfaces.

Behind Certificate Watch is PilzAdam, and it first shipped in 2019. Among its 4 catalogued features are certificate monitoring, change warnings, and firefox integration.

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

Certificate monitoring
Change warnings
Firefox integration
Website security alerts

Built with & integrations

Runs on

BrowserEmbeddableCloud-managed

Trust & compliance

License

Open Source

Verified signals

HTTPSOpen SourceFree tierStore-verified publisher

Indexing history

What PulseGate has recorded for this listing

Indexed13 Sep · 11:45 UTC
Certificate Watch verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Certificate Watch

What is Certificate Watch?: Certificate Watch focuses on detecting unexpected changes to website security certificates before they go unnoticed. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use Certificate Watch?: Certificate Watch is an open-source project built for firefox users concerned about website certificate changes.
Is Certificate Watch free?: Yes — Certificate Watch is open source under the Open Source license and free to use.
What platforms does Certificate Watch run on?: Certificate Watch runs on the web and embeddable surfaces.
Is Certificate Watch still active?: Unverified. Certificate Watch 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 Certificate Watch?: Similar projects tracked by PulseGate include Certificate expiration, Corporate certificate detector, and CertiSafeGuard.Certificate expiration Corporate certificate detector CertiSafeGuard
Who makes Certificate Watch?: Certificate Watch is developed by PilzAdam.
How long has Certificate Watch been around?: Certificate Watch first shipped in 2019.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
License: Open Source
First seen: 13 Sep 2026
Built for: Firefox users concerned about website certificate changes
Model: Open source
Solves: Detecting unexpected changes to website security certificates before they go unnoticed.

Registered as

Firefox Add-ons: certwatch

Developer

PilzAdam

Index record

Indexed: 13 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 13 Sep 2026

Identity audit (13)

Slug: certificate-watch-github-com
Lifecycle state recorded: 13 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 13 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Written by a language model from the project's public pages.
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: 13 Sep 2026
Canonical URL: https://github.com/PilzAdam/CertificateWatch

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