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Browser/OS Information

Root Store OwnerPrimary LinkOther Links
MozillaOverview of All CA-Related Mozilla DocumentationMozilla’s CA Certificate Policy, How To Apply
MicrosoftMicrosoft Root ProgramRoot Program Updates

* Opera Software had a root store program until fall 2013. Opera 14+ will use the root store provided by the OS and the list of EV-enabled roots maintained by Google. Opera < 12 use Opera’s online root store, hereafter based on NSS by Mozilla. To get certificates accepted by Opera, apply to the above-mentioned root store programs for the relevant OS. (Based on visit to

Roots in NSS are listed here – and here:

Latest releases
Code Signing Requirements
v3.7 - Mar 4, 2024

S/MIME Requirements
v1.0.4 - Ballot SMC06 - May 11, 2024

Ballot SMC06: Post implementation clarification and corrections

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The Certification Authority Browser Forum (CA/Browser Forum) is a voluntary gathering of Certificate Issuers and suppliers of Internet browser software and other applications that use certificates (Certificate Consumers).