Current version of Fire Fox is 17.0.1 Try updating Fire fox. Click the Firefox tab in the upper left corner of your browser, go to help, click about Firefox. Now click check for updates. After Firefox updates you will need to restart your browser. Now let’s make sure your Silverlight plugin is turned on. Click Firefox, click Add-ons. Current version of Silverlight is 5.1.10411.0 If it’s grayed out click Enable. I hope this helps. I’ve had no problems viewing your Photosynth’s. With Firefox.
Have a great day, Waldos Digital World