UserAgent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0

Steps to reproduce the problem:
const redDot = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==';

console.log(redDot);
fetch(redDot).then(res=>res.blob()).then(URL.createObjectURL).then(console.log);

What is the expected behavior?
Both the dataURI and objectURL produce working links.

What went wrong?
Only the dataURI works correctly.
The objectURL fails to include the scheme (it begins linking at "https://"), producing an invalid link.

Did this work before? No 

Chrome version: 54.0.2810.2  Channel: dev
OS Version: 
Flash Version: