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CheckMyHTTPS version history - 21 versions

CheckMyHTTPS by CheckMyHTTPS Team

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CheckMyHTTPS version history - 21 versions

  • 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 5.7.31

    Released 12 Dec 2025 - 61.42 kB
    Works with firefox 140.0 and later
    set strict_min_version to 140.0

    Source code released under GNU General Public Licence v3.0 only

    Download Firefox and get the extension
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  • Older versions

    Version 5.7.3

    Released 12 Dec 2025 - 61.41 kB
    Works with firefox 142.0 and later
    Added a list of private Top Level Domains so that the extension does not check (e.g. .localhost)
    Added a list of reserved IP addresses so that the extension does not check (e.g. 100.64.0.0/10)
    Added an informative button on Options page about IDN
    The extension now also checks the fingerprint of the issuer's certificate
    Added error handling of malformed URLs to check
    Added error handling for errors from check server API
    Removed SHA-1 fingerprint usage
    Removed hardcoded SHA256 of check server's certicate (cmh_sha256). If there is a MITM with a valid signature, checkMITM() won't return any error because the RSA-SHA256 signature verification would OK but the signed body response will still contain the (right) SHA256 of the requested's website certificate. Hence, that last hash will be different from the (wrong) SHA256 of the certificate on client side and CMH status will be invalid
    Removed API query parameter 'sign'. Now, every request is signed, no need to specify this parameter
    Renamed API query parameter 'host_raw' to 'host_ip'

    Source code released under GNU General Public Licence v3.0 only

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  • Version 5.7.2

    Released 14 Sep 2025 - 58.35 kB
    Works 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

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  • Version 5.7.1

    Released 4 Feb 2024 - 60.59 kB
    Works with firefox 79.0 and later
    5.7.1 - 2024-02-04
    - Fix loading of options on browser startup (custom server and public key)
    - Better error messages

    Source code released under GNU General Public Licence v3.0 only

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  • Version 5.7.0

    Released 31 Aug 2022 - 60.09 kB
    Works with firefox 79.0 and later

    Source code released under GNU General Public Licence v3.0 only

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  • Version 5.6.0

    Released 28 Jan 2022 - 56.84 kB
    Works 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 options

    Source code released under GNU General Public Licence v3.0 only

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  • Version 5.5.4

    Released 8 Jan 2022 - 56.55 kB
    Works with firefox 62.0 and later, android 62.0 to 68.*
    ## 5.5.4 - 2022-01-08
    - Certificate fingerprint update

    Source code released under GNU General Public Licence v3.0 only

    Download file

  • Version 5.5.3

    Released 6 Dec 2020 - 56.51 kB
    Works with firefox 62.0 and later, android 62.0 to 68.*

    Source code released under GNU General Public Licence v3.0 only

    Download file

  • Version 5.5.2

    Released 28 Jul 2020 - 56.52 kB
    Works with firefox 62.0 and later, android 62.0 to 68.*

    Source code released under GNU General Public Licence v3.0 only

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  • Version 5.5.1

    Released 25 May 2020 - 56.43 kB
    Works with firefox 57.0 and later, android 57.0 to 68.*

    Source code released under GNU General Public Licence v3.0 only

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  • Version 5.5

    Released 19 Jan 2020 - 71.94 kB
    Works with firefox 57.0 and later, android 57.0 to 68.*

    Source code released under GNU General Public Licence v3.0 only

    Download file

  • Version 5.4.1

    Released 27 Nov 2019 - 77.44 kB
    Works with firefox 57.0 and later, android 57.0 to 68.*

    Source code released under GNU General Public Licence v3.0 only

    Download file

  • Version 5.4.0

    Released 25 Aug 2019 - 77.43 kB
    Works with firefox 50.0 and later, android 62.0 to 68.*
    - Add the option to disable notifications

    Source code released under GNU General Public Licence v3.0 only

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  • Version 5.3.2

    Released 30 May 2019 - 77.57 kB
    Works 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

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  • Version 5.3.1

    Released 6 May 2019 - 79.08 kB
    Works 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

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  • Version 5.3.0

    Released 15 Mar 2019 - 75.25 kB
    Works with firefox 50.0 and later, android 50.0 to 68.*

    Source code released under GNU General Public Licence v3.0 only

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  • Version 5.2.1

    Released 1 Feb 2019 - 78.16 kB
    Works 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

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  • Version 5.2.0

    Released 30 Jan 2019 - 78.16 kB
    Works 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

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  • Version 5.1.1

    Released 9 Nov 2018 - 69.88 kB
    Works with firefox 57.0 and later
    - Fix compatibility with Python 3.7.

    Source code released under GNU General Public Licence v3.0 only

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  • Version 5.1.0

    Released 8 Nov 2018 - 69.86 kB
    Works 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

    Download file

  • Version 5.0.0

    Released 6 May 2018 - 73.2 kB
    Works 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

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