ECMS - Firefox TLS Settings
This document explains how to configure Firefox 37 (or newer) to use Perceptive Software WebNow as a fallback host.
Firefox TLS Settings
Update! Lexmark/Perceptive has acknowledged the Mozilla Firefox TLS issue in this KB document (it began with verion 37 and continues in the latest Firefox releases). You are advise to read this document before the information provided below.
Firefox version 37 (or newer) will no longer fallback to less-secure versions of the TLS protocol if it can’t negotiate with the highest level enabled on the webserver to which it attempts a connection. What may happen is that Firefox will try to connect at TLS 1.2 if the server is configured to use TLS 1.2 (the latest version of the protocol). This may fail if certain conditions are in affect. Firefox then may not fall back to TLS 1.1 due to a new fallback-limit in Firefox 37. Thus a secure connection failed error may appear.
Many servers at the UW-Madison may use a security certification component from the same source which may trigger this secure connection failed response when Firefox 37 attempts a connection with them. The servers used for WebNow and eForms do use this InCommons certificate component.
Use the following steps to add the WebNow server to the Firefox fallback hosts.
- In Firefox's Address bar type About:config and press the Enter key:
- Firefox will present a warning. Tell it you will be careful:
- In the search field type TLS and Firefox will filter the list of configuration items leaving only those with TLS in them:
- Click on the item for security.tls.insecure.fallback.hosts:
- Double-click it and in the field type imaging.wisc.edu to add the WebNow server: