CheckMyHTTPS
CheckMyHTTPS ensures that your secured WEB connections ('HTTPS' protocol) are not intercepted (neither decrypted, nor listened, nor modified).
English
Español
Français
Português
日本語
简体中文
한국인
Features & Capabilities
User Growth & Download Statistics
- By:
- CheckMyHTTPS Team
- Daily users:
- 163 4
- Rating:
- 4.40 (10)
- Version:
- 5.8.0 Last updated: 2026-04-16
- Version code:
- 6223884
- Creation date:
- 2016-01-03
- Risk:
- High risk impact Moderate risk likelihood
- Permissions:
- Host permissions:
- https://*/*
- https://*/*
- Size:
- 64.35KB
- Email:
- in*****@checkmyhttps.net
- URLs:
- Website ,Privacy policy
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-15
- Compare stats and ranking:
- CheckMyHTTPS vs Encryption Status Monitor
- CheckMyHTTPS vs Anti Certificate Spoofing
- CheckMyHTTPS vs Web Safety
Ranking
Other platforms
For Developers
Contact the developer
Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
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
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 ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
- High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******
- Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
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.
- Medium **** ********* *** ******* ** *** **** * ******* *** ******* *** *** ** ****** ** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
Extension Guard
Discover every extension in use, analyze risks, and enforce blocking policies with Extension Guard
Secure Your Browser Upgrade to see full risk analysis details
Best CheckMyHTTPS Alternatives
Here are some Firefox add-ons that are similar to CheckMyHTTPS:
Encryption Status Monitor
lucas
- 0.00 
(0) 
Anti Certificate Spoofing
Bonifatius Friedrich
3 4.67 (3) 
Web Safety
Tatami-web
1 0.00 (0) 
secured-webpage-verifier
Shivam Dubey
2 0.00 (0) Secure Connection Monitor
Mette
5 0.00 (0) 
Smart HTTPS
ilGur
17K 4.38 (258) 
TrustedSite
TrustedSite
7 0.00 (0) SSL Certificate Checker sp
Luke Fields
16 0.00 (0) 
SSL Certificate Checker
TK88
7 0.00 (0) Proxy Certificate Check
Aioli Fresco
1 0.00 (0)