From my host file:
URL pattern:
	
	^https?:\/\/([^/]+\.)?imgbox\.com\/(?!(comments|register|settings)$)\w{8}$
 Search pattern:
	
	function(pageData, pageUrl) {
	var retVal = {imgUrl: null, fileName: null, status: "ABORT"};
	// Search for <img ... id="img" ... >
	var iTag = (pageData.match(/<img\b[^>]*?\bid\s*=\s*('|")img\1[^>]*?>/i)||[])[0];
	if (iTag) {
		var iUrl  = (iTag.match(/\bsrc\s*=\s*('|")(.*?)\1/i)||[])[2];
		var iName = (iTag.match(/\btitle\s*=\s*('|")(.*?)\1/i)||[])[2];
		if (iUrl) {
			retVal.imgUrl = iUrl;
			retVal.status = "OK";
			if (iName) {  // exists and is not empty
				retVal.fileName = iName;
			}
		}
	}
	return retVal;
}
 I don't remember if this is default or one that I had to fix.  Either way, I just tried it and it still works.