Newtype

Thank you, this worked!

I don't think it's the same. It happens even on a fresh install of Firefox. To be sure, I just tried a portable version of Firefox Beta and the issue was still occurring. If this is a site-specific issue, is there a way to disable HTTPS scanning for that Web site only?

There's an alternate version of this Web site that's in English and doesn't have any of the issues that the French version has. https://www.tsn.ca/ Does that Web site use HSTS as well?

It works with Edge. Have you tried clearing cookies and site data, then shutting down Firefox, opening it again and trying the site? For me that never works.

Like you said, the site is unpredictable. Sometimes it works, rarely, but most often it doesn't. Clearing cookies and site data doesn't work for me, I tried it a bunch of times.

I'm not sure if this is an ESET problem or a Firefox problem. This is the only Web site I've ever had problems with and it's been going on for months. The Web site in question is: https://www.rds.ca/ When ESET's HTTPS Traffic Scanning is enabled, the Web site's certificate is ESET. Clicking on any link will result in a "Secure Connection Failed" error in Firefox and also some images will sometimes fail to load. If I disable HTTPS Traffic Scanning, the Web site's certificate is Entrust, Inc. and everything will work correctly. This is a Web site that I need to visit every day so I don't know what to do.