CheckMyHTTPS

Name: CheckMyHTTPS
Rating: 4.4 (10 reviews)
Author: CheckMyHTTPS Team

CheckMyHTTPS ensures that your secured WEB connections ('HTTPS' protocol) are not intercepted (neither decrypted, nor listened, nor modified).

Overview

Firefox Add-ons Store

Daily users

150 ▲ 1

Data as of 2026-10-08

Rating:

4.40

(10)

Version:

5.8.0

Last updated: 2026-04-16

Features & Capabilities

CheckMyHTTPS is a Chrome extension that lets you quickly verify the security of HTTPS pages with a single click. It displays a color-coded status icon:

Green: the connection is safe
Red: the connection is compromised
Gray: verification is not possible
Black: verification is in progress

Technical details: The extension compares the site certificate received by your browser with a certificate retrieved from an external check server. If the certificates differ, the connection may be hijacked or subject to SSL inspection. Privacy: Only the domain name and IP address are sent to the check server, and you can host your own server. You can learn more at the project website.

User Growth & Download Statistics

Add-on Privacy & Security Developer Tools Open Source

By:

Daily users:

Rating:

Version:

5.8.0 Last updated: 2026-04-16

Version code:

6223884

Creation date:

2016-01-03

Firefox add-on GUID:

info@checkmyhttps.net

Firefox add-on numeric ID:

677685

Weekly download count:

Firefox on Android:

Risk:

Permissions:

Host permissions:

https://*/*

Size:

64.35KB

Email:

in*****@checkmyhttps.net

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-10-08

Compare stats and ranking:

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:: CheckMyHTTPS Team
Firefox Add-ons Store: https://addons.mozilla.org/firefox/addon/checkmyhttps/
Email:: in*****@checkmyhttps.net
Website:: https://github.com/checkmyhttps/checkmyhttps/issues

Permission Change History

2026-03-22: Version 5.7.32 → 5.7.33

Add Permissions: dns

2025-09-14: Version 5.7.1 → 5.7.2

Add Host permissions: https://*/*

Remove Permissions: *://*/*

User Reviews

Not perfect, but does the job. The only extension of it's kind I know which allows me to quickly check (even from time to time) whether my connection is not intercepted by e.g. corporate tools. Deserves 5 stars. Thanks.

by ko***** 2025-09-04

** Major trust issue alert ** The add-on reports that it now has a compromised back end service API. You may now see an error "This public key does not match the one required by the server" within the add-on about:addons config screen. I have tried this on multiple computers, same catastrophic security error. The public key no longer matches the expected API key. This add-on normally sends all your website URLs to a back end server that the developer hosts free of charge (how "generous"... hmmm). Notwithstanding this suspicious setup which is funded "some how", this error would indicate their server has been compromised. Someone else is now hoovering up all your URLs, maybe the CIA, FBI, MI5, Mossad... who knows. Also, https://www.ssllabs.com/ssltest/analyze.html?d=checkmyhttps.net suggests the server's certificate chain is incomplete. which is odd. The Public key you should see in the add-on.. -----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----

by Fi***** 2024-01-15

View all user reviews ›

Is CheckMyHTTPS 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.

CheckMyHTTPS 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.
Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
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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.

CheckMyHTTPS is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

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