[BNM] Firefox resizing images

[Ali]

anyone know how to prevent Firefox from resizing images to fit the window? specifically I am viewing gif files (designer mock-ups) with the browser and wish to show them full size with scrollbars - specifically to highlight the problem of not being able to see the bottom in certain window sizes and resolutions......

the blasted thing keeps resizing the gifs to fit - I know I could create web pages with the images but that seems like too much work......

Ali