[Greasemonkey] Access-Control-Allow-Origin doesn't allow cross domain URLs

[samcv]

Friend who also uses QupZilla told me about this bug which I was able to replicate as well.

Installing 4chan-X greasemonkey script, it works for the most part, but the download links it adds to the page do not work. If you lanch QupZilla in the console you get these messages:

js: XMLHttpRequest cannot load https://i.4cdn.org/g/1450659832892.png. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://boards.4chan.org' is therefore not allowed access.

Message showed when clicking this:

When clicking picture dl link from above at http://boards.4chan.org/g/

script homepage is here https://github.com/ccd0/4chan-x

Script location here: https://www.4chan-x.net/builds/4chan-X.user.js