Do no evil with Avira (or nasty HTTPS handshakes)
https://blog.avira.com/evil-nasty-https-handshakes/

Avast 2016: HTTPS scanning in Web Shield - FAQs
https://www.avast.com/en-us/faq.php?article=AVKB190

http://www.zdnet.com/article/google-and-mozillas-message-to-av-and-security-firms-stop-trashing-https/

The researchers urge antivirus vendors to stop intercepting HTTPS altogether, since the products already have access to the local filesystem, browser memory, and content loaded over HTTPS.

Additionally, they charge all security companies with acting “negligently”.

“Many of the vulnerabilities we find in antivirus products and corporate middleboxes, such as failing to validate certificates and advertising broken ciphers, are negligent and another data point in a worrying trend of security products worsening security rather than improving it,” they write.