> As a CT log operator, do I need to begin submitting my new logs to
Firefox, or will you take logs from the other programs?
> As a CA, do you have a list of supported logs that we can validate
against?

Currently Firefox derives the list of trusted logs from Google's list:
https://www.gstatic.com/ct/log_list/v3/log_list.json
Should this ever change, we'll give plenty of notice.
To see what logs are in a particular version of Firefox, you can examine
the history of
https://searchfox.org/mozilla-central/source/security/ct/CTKnownLogs.h

On Tue, Feb 4, 2025 at 1:05 PM Matthew McPherrin <[email protected]>
wrote:

> Congratulations!
>
> As a CT log operator, do I need to begin submitting my new logs to
> Firefox, or will you take logs from the other programs?
> As a CA, do you have a list of supported logs that we can validate against?
>
> Thanks,
>
> Matthew McPherrin
> Let's Encrypt SRE
>
> On Tuesday, February 4, 2025 at 2:54:28 PM UTC-5 Dana Keeler wrote:
>
>> Hi folks,
>>
>> Certificate Transparency is an important part of the web PKI that enables
>> the detection of misissued certificates. Starting in Firefox 135,
>> Certificate Transparency is now enforced on all desktop platforms. This
>> means that Firefox now requires that TLS web server certificates issued
>> from roots in Mozilla's Root CA program be accompanied by sufficient
>> Certificate Transparency information (essentially, 2 SCTs) in order for TLS
>> connections to succeed. Otherwise, Firefox will show the error "
>> MOZILLA_PKIX_ERROR_INSUFFICIENT_CERTIFICATE_TRANSPARENCY".
>>
>> In practice, this should require no particular changes on the part of
>> website operators. If your site works in Chrome and Safari, it should work
>> in Firefox as well. However, if you were making use of policies to exempt
>> certain internal certificates or domains from CT, you will need to apply
>> those policies to Firefox as well. See
>> https://wiki.mozilla.org/SecurityEngineering/Certificate_Transparency#Enterprise_Policies
>>
>> If you encounter any issues, please let us know or file a bug directly:
>> https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&component=Security%3A%20PSM
>>
>> Thank you,
>> Dana
>>
>

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