PDF.js is a new project from Mozilla to render PDFs using pure Javascript and HTML. So I thought to put it through its paces - what would happen if I gave it a PDF of one of Diwan’s most complex Arabic fonts to render. This usually stretches Adobe’s own Acrobat. Here is the result (click on the image to see it full size):

Yes, that is a 3000 glyph font with complex transformations rendering in a standard web page. Very cool.