I have a 100% ZEN application combined with 100% ZENReports and am also using IFind which is part of the solution.

 Our application is a cloud hosted solution where we lease a server which does not have a website, only  Cache configured under IIS.  Connectivity to our site is premised on a URL string such as  u12345.usa-server.com/csp/namespace/Cache.cls

With the release of Firefox V52 this connection string is now seen as security threat as we have an application login page using  two <password> controls.