Reported issue: During integration, different web browsers were used to test the implementation of the device collector and now some browsers are blocking the device collector calls.
Troubleshooting: This behavior is somewhat rare but using different web browsers to implement Device Collector can result in the Test page being set to HTTP instead of HTTPS. Depending on the security settings used by a particular browser, HTTPS calls from an HTTP page can become blocked.
For instance, Internet Explorer will block the calls, Chrome will issue a warning but allow the call, and Firefox will allow the call with no warnings.