I think that was more because of the site, not the certificate - the grey failure page would appear for sites that use HSTS[0]. If the site didn't use HSTS or i

I think that was more because of the site, not the certificate - the grey failure page would appear for sites that use HSTS[0]. If the site didn't use HSTS or if you visited it for the first time, you'd get an ordinary certificate error alert. [0] https://en.wikipedia.org/wiki/HSTS https://en.wikipedia.org/wiki/HSTS