Lee,

I am familiar with some mobile emulators that you can use with Firefox. Once you install the latest version of Firefox you should upload the following Add-ons:

- User Agent Switcher 0.61.11
- wmlbrowser 0.7.20

Once you have installed Firefox and the the add-ons, you will find the switch option under Tools>User Agent Switcher.

Note: unfortunately I can't add external URL on this thread, but if you search those add-ons with Google you will find them without a problem.

I hope this helps

Regards