host2image

manifest.json

{
	"name": "host2image",
	"description": "Редирект с хостинга с рекламой на картинку.",
	"author": "felixexter",
	"version": "2.0",
	"content_scripts": [{
		"all_frames": false,
		"js": [ "script.js" ],
		"matches": [ "http://*/*", "https://*/*" ],
		"run_at": "document_end"
	}],
	"manifest_version": 2,
	"permissions": ["tabs"]
}

script.js

(function (doc, host, blacklist) {
	blacklist[host] &&
	doc.querySelector(blacklist[host]) &&
	(location.href = doc.querySelector(blacklist[host]).src)
})(document, location.host, {
	'clip2net.com': '.image-pic-max > img',
	'fastpic.ru': '#picContainer img',
	'joxi.ru': '.tile-preview > img',
	'monosnap.com': '#currentItem',
	'prntscr.com': '.image__pic',
	'snag.gy': '.mainImage'
});