Programmes: elinks, fbida
Files to edit: ~/.elinks/elinks.conf
Start by installing a suitable image viewer. I use
fbida, as it provides both a framebuffer-, and X-based image viewer (fbi and ida respectively).
Next, add some MIME types to elinks.conf.
Code:
set mime.extension.jpg="image/jpeg"
set mime.extension.jpeg="image/jpeg"
set mime.extension.png="image/png"
set mime.extension.gif="image/gif"
...