CheckMyHTTPS version history - 19 versions
CheckMyHTTPS by CheckMyHTTPS Team
Be careful with old versions! These versions are displayed for testing and reference purposes.You should always use the latest version of an add-on.
Latest version
Version 5.7.2
Released 14 Sep 2025 - 58.35 kBWorks with firefox 115.0 and later- Visual improvement of Options page
- Handle the case of checking addons.mozilla.org's certificate which is not possible due to a safety feature where Firefox prevents its extensions from manipulating the extension store website
- By default, the extension icon is icon.png, not unknown.png anymore.
- Improved error handling messages
- Reorganized and improved localization messages
- Removed severalCertificates 'SC' case handling. It is now considered invalid.
- Checking an IDN (Internationalized Domain Name) website is now considered valid (as long as both certificate fingerprints are equal).
- Made the IDN warning notification clickable to redirect the user to wikipedia's IDN homograph attack page
- Removed Warning status as severalCertificates and IDN cases are no longer considered warning
Source code released under GNU General Public Licence v3.0 only
Older versions
Version 5.7.1
Released 4 Feb 2024 - 60.59 kBWorks with firefox 79.0 and later5.7.1 - 2024-02-04
- Fix loading of options on browser startup (custom server and public key)
- Better error messagesSource code released under GNU General Public Licence v3.0 only
Version 5.7.0
Released 31 Aug 2022 - 60.09 kBWorks with firefox 79.0 and laterSource code released under GNU General Public Licence v3.0 only
Version 5.6.0
Released 28 Jan 2022 - 56.84 kBWorks with firefox 62.0 and later## 5.6.0 - 2022-01-28
- Add IP getter and call API with it, in order to avoid false negatives
- Improved appearance of optionsSource code released under GNU General Public Licence v3.0 only
Version 5.5.4
Released 8 Jan 2022 - 56.55 kBWorks with firefox 62.0 and later, android 62.0 to 68.*## 5.5.4 - 2022-01-08
- Certificate fingerprint updateSource code released under GNU General Public Licence v3.0 only
Version 5.5.3
Released 6 Dec 2020 - 56.51 kBWorks with firefox 62.0 and later, android 62.0 to 68.*Source code released under GNU General Public Licence v3.0 only
Version 5.5.2
Released 28 Jul 2020 - 56.52 kBWorks with firefox 62.0 and later, android 62.0 to 68.*Source code released under GNU General Public Licence v3.0 only
Version 5.5.1
Released 25 May 2020 - 56.43 kBWorks with firefox 57.0 and later, android 57.0 to 68.*Source code released under GNU General Public Licence v3.0 only
Version 5.5
Released 19 Jan 2020 - 71.94 kBWorks with firefox 57.0 and later, android 57.0 to 68.*Source code released under GNU General Public Licence v3.0 only
Version 5.4.1
Released 27 Nov 2019 - 77.44 kBWorks with firefox 57.0 and later, android 57.0 to 68.*Source code released under GNU General Public Licence v3.0 only
Version 5.4.0
Released 25 Aug 2019 - 77.43 kBWorks with firefox 50.0 and later, android 62.0 to 68.*- Add the option to disable notificationsSource code released under GNU General Public Licence v3.0 only
Version 5.3.2
Released 30 May 2019 - 77.57 kBWorks with firefox 50.0 and later, android 62.0 to 68.*- Fix the error message when the check server is down.Source code released under GNU General Public Licence v3.0 only
Version 5.3.1
Released 6 May 2019 - 79.08 kBWorks with firefox 50.0 and later, android 62.0 to 68.*- Fix a bug preventing the error message when checking the check server.Source code released under GNU General Public Licence v3.0 only
Version 5.3.0
Released 15 Mar 2019 - 75.25 kBWorks with firefox 50.0 and later, android 50.0 to 68.*Source code released under GNU General Public Licence v3.0 only
Version 5.2.1
Released 1 Feb 2019 - 78.16 kBWorks with firefox 57.0 and later, android 62.0 to 68.*- Fix SSL Pinning on Check Server.Source code released under GNU General Public Licence v3.0 only
Version 5.2.0
Released 30 Jan 2019 - 78.16 kBWorks with firefox 57.0 and later, android 62.0 to 68.*- Support the WebExtension TLS API (the Python script is now optional on Firefox > 62).
- Back on Firefox Mobile!
- Improved tab management.Source code released under GNU General Public Licence v3.0 only
Version 5.1.1
Released 9 Nov 2018 - 69.88 kBWorks with firefox 57.0 and later- Fix compatibility with Python 3.7.Source code released under GNU General Public Licence v3.0 only
Version 5.1.0
Released 8 Nov 2018 - 69.86 kBWorks with firefox 57.0 and later- Add proxy support in Python script.
- Increase timeout to 10sec.Source code released under GNU General Public Licence v3.0 only
Version 5.0.0
Released 6 May 2018 - 73.2 kBWorks with firefox 57.0 and later- Migration to WebExtension!
- Use a Python script to perform a check (pending the WebExtension TLS API).Source code released under GNU General Public Licence v3.0 only