How to find image path (using Firefox)

While you are on the page with image, open Firefox menu, than Web Devoloper and Web Console. Now try to zoom or move inside the picture, until in console will appear something like that:
[time] GET http://www.example.com/web/media/images/Image/Archive/OldExmaple//TileGroup0/3-0-0.jpg [HTTP/1.1 200 OK 294ms]
From that you can easily extract the image path (it is http://www.example.com/web/media/images/Image/Archive/OldExmaple//).