Privacy Browser Android

I am inclined not to do so as these errors usually indicate a MITM (Man In The Middle) attack, and so it is important for them to be displayed. And this is a Man In The Middle; it just isn't an attack because you have authorized the Man to do so.

Note that you can solve this issue right now by adding the SSL certificate from your blocking server to your Android device:

https://support.google.com/nexus/answer/2844832?hl=en

In the future it will be possible to manage SSL certificates directly inside of Privacy Browser:

https://redmine.stoutner.com/issues/283

You can also solve the problem by having the network-wide DNS blocklist point to an IP address that doesn't respond at all (like 127.0.0.1), instead of one that does and presents an SSL certificate that doesn't match.

And in the future, you will be able to add custom blocklists to Privacy Browser, which will enable you to block whatever you like at the phone level and the requests will never be made (and an error will never be shown):

https://redmine.stoutner.com/issues/181

By the way, from your screenshot my guess is you are using pfSense with pfBlockerNG (because the certificate is issued by CN_DNSBL). Good taste.