To avoid certificate trust errors and to enable the re-signing certificate authority to successfully re-sign certificates, browsers must trust this certificate authority. Such trust can be established by having the re-signing certificate imported into the browser's trusted CA list. Internet Explorer, Chrome, Opera uses the Windows Certificate store to build trust. Mozilla Firefox uses its own certificate store and the CA certificate must be manually imported into the Firefox certificate store. This article describes the process of manual import of the SonicWall DPI-SSL CA certificate into Mozilla Firefox.