Yesterday after deploying two new vCenters (with the same FQDN as the previous vCenters) FireFox on the Mac gave me this error when ever I loaded up the Web Client:

RSL https://vcnyc.corp.com:9443/vsphere-client/locales/rsl/flex-common-lib-5.5.0.swf failed to load. Error #2032

All my other web-browsers (Chrome, FireFox, IE on Windows, Chrome, Safari on the Mac) were happy. Fortunately, a full reset of FireFox fixed my issue – all I had to do after the reset of FireFox was re-install my LastPass plug-in…

Article: How to reset FireFox…