no notification for login to a hotspot landing page

How do I clear the cache, or otherwise reset firefox, to create the notification for a landing page to login to a hotspot?

I don't want to automate the process, I simply want to allow allow for the notification. Restarting the device works, but is very much a kludge.

see also:

http://ift.tt/1zEviLs

http://ift.tt/176IoKP