You Don't Know GIF – An analysis of a GIF file and some weird GIF features
>Now the first line ends like this which is still a perfectly valid gif. How might that look?>Amazing! Stupendous! Wonderful! As of the time of this writing, it’s just a perfectly black square. And this is the case in every single renderer I’ve tried. Gimp, Chrome, Firefox, Preview, gifiddle, you name it.Funnily enough in my browser (Firefox on Ubuntu) it's transparent, but it's level of transparency I have never seen before - I can see the window below.