We are using Zscaler as proxy in our Wifi environment, due to security environment, we need to turn on SSL inspection for all web browsing traffic, with this features, we need to install the Zscaler root certificate in our device, otherwise will have certificate error for all web site. In windows OS and iOS, it work perfectly fine for all browser include Chrome, FireFox, Edge, IE, Safari. But on Android, other browser was work except Firefox, after consult with Zscaler support, they found that Android Firefox uses its own certificate store, so getting a cert error unless import the root CA into Firefox's cert store. Please suggest any procedure to import custom root cert into Firefox. Attached is the error screenshot