You should make your requests for IHG here: https://imagehostgrabber.com/forum/index.php
Try this:
URL Pattern:
	
	^https?:\/\/acidimg\.cc\/.+$
 Search Pattern:
	
	function(pageData, pageUrl) {
	var req = new XMLHttpRequest();
	req.open("POST", pageUrl, false);
	req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
	req.send("imgContinue=Continue+to+image+...+");
	var iUrl = (req.responseText).match(/(?:href|src)=('|")(https?:\/\/[^/]+\/upload\/big\/.+?)\1/);
	return iUrl ? {imgUrl: iUrl[2], status: "OK"} : {imgUrl: null, status: "ABORT"}
}