pdfit is a useful Firefox extension to convert current webpage into an image format (JPEG or PNG). You can later convert this image into PDF format. There are number of options to configure during page to image conversion.
You can apply some image filters like emboss, rotate, reflection etc to resultant image. Some filters may take long time to implement when used on full page as compared to part of a webpage.
You can also add title to generated image and specify the color, position, font size for the title. You can later convert image to PDF, it will be just single image in PDF format with no editing option for hyperlinks and text. PDFit Firefox Extensionis one quick way to convert webpage into image within Firefox.