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Adds a context menu item for viewing images using advanced controls: The image is opened in a new tab which also contains a thumbnail view of the image used to scroll around more easily, zoom controls with various zoom levels etc.
About this Add-on
The main reason I wrote this; is because viewing big (more than 2500 pixels) images in firefox sucks. zoomFox provides an easy way to zoom, but it also provides an easy way to scroll around using click+drag on the red box of the thumbnail or on the main image.