Once you install a Code Signing certificate in your browser, you might want to export it from Internet Explorer® or Firefox® to use elsewhere. For example, you might want to back it up, or use it on another computer.
If the "Yes, export the private key" option is not available, your private key is not present or is marked as not exportable. To determine if the private key is available, view the details of the certificate. The contents of the dialog indicate whether a private key is associated with the certificate.
Upon completion, you receive confirmation that the export was successful.
TIP: To use your certificate with other software tools, you might need to convert the exported PFX file to PVK and SPC files. See Converting an Exported PFX Code Signing File to PVK and SPC Files using Windows for information.