Using Firefox 45.8.0 ESR on Windows.
Trying to load https://secure.scheduleonce.com/dana
The page doesn't load, and in the network panel I see a crossed padlock icon instead of green padlock icon for this request:
OPTIONS https://cfproxy.scheduleonce.com/get-data/GetLandingPageLayout
When floating over the padlock I see the following message:
The connection used to fetch this request was not secure.
The page loads fine on Chrome / Safari / IE and even more recent version of FF.
Is there any way to debug what's wrong with that request to resource exactly ? FF doesn't give me any information as to what went wrong.
I suspect it might be related to the fact it's a preflight CORS request (the requested domain is different than that hosted page domain).
Attaching HAR file of the network : https://www.dropbox.com/s/i59k66a2w8p3ast/Archive%2017-09-10%2007-06-15.har?dl=0
Can be viewer here: (https://toolbox.googleapps.com/apps/har_analyzer)
Thanks.
Problem was with the cipher suite choice on the server.
I used this site to change it: https://mozilla.github.io/server-side-tls/ssl-config-generator/
To support older browsers as well.
I don't know what was in FF 45.8.0 ESR that made it not respect the security of the server.