Which browser can I use to signup for an S/MIME (Email) Certificate?

The private key for an S/MIME certificate is generated by the browser during certificate enrollment. When the submit button is selected, a key-pair of the selected size is generated. Once generated, the private key is encrypted and stored in the local key database.

S/MIME certificates can be applied only using Internet Explorer on Windows.

note: Safari on Mac no longer supports key generation.

Firefox ESR version 68 and earlier can be used for this purpose.
Firefox has stopped keygen support from version 69 [ released on 3-Sep-2019 ]


Coming Soon!
In an effort to help with Code Singing and S/MIME CSR Generation on browsers that no longer support key generation, Sectigo is currently finalizing a CSR Generation Utility where you will be able to generate the CSR for the following certificate types:

  • Email
  • Code Signing
  • SSL

You will also have the option to:

  • Generate a private key on a SmartCard.
  • Save the CSR to a file

Should you have any questions or concerns please do not hesitate to contact our Technical Support Team

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