MCDzienny

Currently, I re-downloaded MCDzienny on a Ubuntu (Debian) system and I did "sudo mozroots --import --ask-remove" & "sudo certmgr -ssl -m https://minecraft.net" , but it still isn't sending a heartbeat to minecraft.net. Anyone else having this issue?

I believe you are heading in the right direction. The problem is related to SSL. I don't have Linux installed so I can't help you on that. Check the answer on SO, it may help you.