I'm surprised why this is a recommended addon while it's not working in the latest stable version of FF (3.0.10)! I installed it today, customized it to display local images, and started it via the right click option on its status bar icon. A black screen appeared. On it were a logo of Fox Saver, 5 buttons (Play/Pause, Stop, Previous, Next, Full Screen), and an image of revolving dots (probably telling me to wait).
I waited and waited, but nothing happened. I then changed the options and disabled all manipulations of the images (tilt, reflection, etc.) but still the same thing.
Frustrated, I left further tweaking. An application as simple as this addon must work out of the box. But it's not working even after tweaking all the relevant options.
But since it's a recommended addon, I doubt if it hasn't worked on other people's computers. I have other addons installed; maybe compatibility with them is an issue. Whatever be the reason, it's not working for me. So sad :-(