tl;dr There is an adware called Privdog that gets shipped with software from Comodo. It totally breaks HTTPS security.
more here.........https://blog.hboeck.de/archives/865-Comodo-ships-Adware-Privdog-worse-than-Superfish.html
Also here you can test your system for privdog.....https://filippo.io/Badfish/
more here.........https://blog.hboeck.de/archives/865-Comodo-ships-Adware-Privdog-worse-than-Superfish.html
Also here you can test your system for privdog.....https://filippo.io/Badfish/