Certificate Pinner

Name: Certificate Pinner
Rating: 4.4 (10 reviews)
Author: Heurekus

Pins TLS certificates of configured web pages and interrupts/alerts when a new certificate is presented. Adds a button to the browser's toolbar for pinning and unpinning.

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Features & Capabilities

Certificate Pinner is a Chrome extension that enhances your browser's security by allowing you to pin TLS certificates for specific web pages. It monitors the TLS certificates presented when you visit configured sites and interrupts the connection if a new certificate is detected that doesn’t match the stored fingerprint. This proactive approach prevents session hijacking and protects your local secrets like cookies and passwords from being sent to potentially malicious servers.

With an easy-to-use toolbar button, you can quickly pin or unpin certificates and view all your pinned certificates at a glance. When a mismatched certificate is detected, the extension opens a warning tab providing details about the new certificate, enabling you to verify its authenticity before proceeding. Certificate Pinner is a crucial tool for users keen on maintaining high standards of online security and trust when browsing.

User Growth & Download Statistics

Add-on Privacy & Security

By:

Daily users:

Rating:

Version:

0.17.10 Last updated: 2020-07-10

Version code:

5055243

Creation date:

2019-06-18

Risk:

Permissions:

Size:

32.36KB

Email:

ms*****@cm-networks.de

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-18

Compare stats and ranking:

Ranking

# 13,782 ▲ 89

Other rankings

#12 in winner keyword 16

#87 in present keyword 31 ▼ 1

#160 in catalog keyword 7 ▼ 2

#163 in education keyword 10 ▼ 1

#169 in category keyword 23 ▼ 2

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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:

Heurekus

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/certificate-pinner/

Email:

ms*****@cm-networks.de

Website:

https://codeberg.org/heurekus/certificate-pinner-for-firefox

User Reviews

Since stupid decision by browsers to remove green bar, this plugin is a way to fill that security gap

by Ed*****, 2025-07-05

Not working with ip addresses (only with domains)

by Ha*****, 2023-02-08

View all user reviews ›

Is Certificate Pinner 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.

Certificate Pinner requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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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.

Certificate Pinner has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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