How to add a custom/self-signed SSL CA?
Firefox for Android doesn't use the operating system's SSL store, and there doesn't seem to be a reasonable way to add a self-signed CA to the application's SSL store either. Please expose a workflow which will allow a user to manually add a CA to Firefox for Android.
P.S. Since Firefox uses a custom SSL store as well (but at least there's a way to add one), I think you should consider adding the manually added CAs as part of the sync even.
P.P.S. Personally, I would also use the OS' store at least as a base template for the application's store if possible.
Wšykne wótegrona (1)
I did find some add ons that do this, however you may run into the CA Self Signed Cert policy: https://blog.mozilla.org/security/201.../may-2015-ca-communication/