Use the Certificate Manager to make sure that your root certificate is imported into the browser, and has the websites trust bit enabled.
* https://wiki.mozilla.org/CA:UserCertDB#Importing_a_Root_Certificate
'''Note:''' This step is required if your root certificate was included in NSS after ESR 24 was released, or if your root certificate hasn't yet been added to NSS.
== Find Profile / Configuration directory ==