Connection is not secure -- Firefox

Avast Free Antivirus / Premium Security
1

I just switched from Avira to Avast antivirus and I am now getting “Connection is not secure” for the home page of my Blogger blog in Firefox (not in IE).

www.dbdebunk.com

I tried to figure out what the various online explanations say but I have no clue what they mean.

What do I do, if anything?

2

Make sure that you completely uninstall the Avira Antivirus then How to Successfully Install Avast http://goo.gl/VLXde
Thanks to@ bob3160.
FYI:I have no issue with the link you provided on Firefox.