I get the error
And since I'm one of the website owners, I'd like to know what I can do to solve it!Secure Connection Failed
The connection to (site name) was interrupted while the page was loading.
• The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
• Please contact the website owners to inform them of this problem.
Learn more…
☐ Report errors like this to help Mozilla identify and block malicious sites
Some testing shows that
- The security certificates are not expired.
- Other sites with similar certificates (both from the same issuer, using sha256, 2048 bit keys etc) still function OK.
- The website shows up fine in Firefox 56 (the current Developer Edition), as well as all other browsers I tried (Chrome, IE, Edge).
- The problem occurs both in the Windows and Linux versions, with the 32 bit and 64 bit nightlies, and in SeaMonkey 2.54, so it's not a bug in one particular nightly.
Then what can I do now? How can I ascertain what exactly FF57 is choking on?
If, as this page hints, the websites are using "out-dated (no longer secure) TLS mechanisms in an attempt to secure your connection", how can I find out which TLS mechanism is used, so that I can tell my CA to give me more up-to-date certificates?
I know that older SSL methods are being phased out, so that could be it.
Or is it a bug after all? I tried searching Bugzilla, but nothing recent came up, nothing that explained the differences between Gecko 56 and 57. This page is still empty too.
So what to do?