diff --git a/background.js b/background.js
index 0120efe..95a40c9 100644
--- a/background.js
+++ b/background.js
@@ -2,21 +2,25 @@ var accessControlRequestHeaders;
 var exposedHeaders;
 
 var requestListener = function(details){
-	var flag = false,
-		rule = {
-			name: "Origin",
-			value: "http://evil.com/"
-		};
+	var flag = false;
+	// Specify a `name` and `value` property within `rule` to
+	// customize a request header. For instance, the commented
+	// out values will include in the header "Origin: 'https://my_changed_origin.com'"
+	var rule = null;
+	// var rule = {
+		// name: "Origin",
+		// value: "https://my_changed_origin.com"
+	// };
 	var i;
 
 	for (i = 0; i < details.requestHeaders.length; ++i) {
-		if (details.requestHeaders[i].name.toLowerCase() === rule.name.toLowerCase()) {
+		if (rule && details.requestHeaders[i].name.toLowerCase() === rule.name.toLowerCase()) {
 			flag = true;
 			details.requestHeaders[i].value = rule.value;
 			break;
 		}
 	}
-	if(!flag) details.requestHeaders.push(rule);
+	if(rule && !flag) details.requestHeaders.push(rule);
 	
 	for (i = 0; i < details.requestHeaders.length; ++i) {
 		if (details.requestHeaders[i].name.toLowerCase() === "access-control-request-headers") {
diff --git a/manifest.json b/manifest.json
index 7a4b744..4c9e3c7 100644
--- a/manifest.json
+++ b/manifest.json
@@ -1,7 +1,7 @@
 {
 	"name": "Allow-Control-Allow-Origin: *",
-	"version": "1.0.2",
-	"manifest_version": 2,
+	"version": "1.0.3",
+	"manifest_version": 3,
 	"description": "Allows to you request any site with ajax from any source. Adds to response 'Allow-Control-Allow-Origin: *' header",
 	"background": {
 		"scripts": ["background.js"]