diff --git a/content/treestyletab/windowHelperHacks.js b/content/treestyletab/windowHelperHacks.js
index 19d1496a..15922cf4 100644
--- a/content/treestyletab/windowHelperHacks.js
+++ b/content/treestyletab/windowHelperHacks.js
@@ -668,25 +668,53 @@ TreeStyleTabWindowHelper.overrideExtensionsAfterBrowserInit = function TSTWH_ove
 	// Greasemonkey
 	// https://addons.mozilla.org/firefox/addon/748
 	if (sv.getTreePref('compatibility.Greasemonkey')) {
-		if ('GM_BrowserUI' in window && 'openInTab' in GM_BrowserUI) {
-			eval('GM_BrowserUI.openInTab = '+
-				GM_BrowserUI.openInTab.toSource().replace(
-					/(if\s*\(this\.isMyWindow\([^\)]+\)\)\s*\{\s*)(this\.tabBrowser)/,
-					'$1 TreeStyleTabService.readyToOpenChildTab($2); $2'
-				)
-			);
+		try {
+			let hitchModule = Components.utils.import('resource://greasemonkey/util/hitch.js', {});
+			let hitch = hitchModule.hitch;
+			if (hitch.toSource().indexOf('TreeStyleTabService') < 0) {
+				hitchModule.hitch = function(aObject, aMethod) {
+					if (typeof aMethod == 'function' &&
+						aMethod.toSource().indexOf('function openInTab') > -1) {
+						let originalOpenInTab = aMethod;
+						/**
+						 * This function must be replaced on scripts in "chrome:" URL, like this.
+						 * Otherwise the original openInTab() will raise violation error.
+						 * Don't move this hack into JS code modules with "resource:" URL.
+						 */
+						aMethod = function openInTab(aSafeContentWindow, aChromeWindow, aURL, aLoadInBackgtound) {
+							if (aChromeWindow.TreeStyleTabService)
+								aChromeWindow.TreeStyleTabService.readyToOpenChildTabNow(aSafeContentWindow);
+							return originalOpenInTab.apply(this, arguments);
+						};
+					}
+					return hitch.apply(this, arguments);
+				};
+			}
 		}
-		else if ('@greasemonkey.mozdev.org/greasemonkey-service;1' in Components.classes) {
-			let service = Components.classes['@greasemonkey.mozdev.org/greasemonkey-service;1'].getService().wrappedJSObject;
-			if (service) {
-				let _openInTab = service.__proto__._openInTab;
-				if (_openInTab.toSource().indexOf('TreeStyleTabService') < 0) {
-					service.__proto__._openInTab = function() {
-						let contentWindow = arguments[0];
-						let chromeWindow = arguments[1];
-						chromeWindow.TreeStyleTabService.readyToOpenChildTabNow(contentWindow);
-						return _openInTab.apply(this, arguments);
-					};
+		catch(e) {
+			dump(e+'\n');
+
+			// hacks for old versions
+			if ('GM_BrowserUI' in window && 'openInTab' in GM_BrowserUI) {
+				eval('GM_BrowserUI.openInTab = '+
+					GM_BrowserUI.openInTab.toSource().replace(
+						/(if\s*\(this\.isMyWindow\([^\)]+\)\)\s*\{\s*)(this\.tabBrowser)/,
+						'$1 TreeStyleTabService.readyToOpenChildTab($2); $2'
+					)
+				);
+			}
+			else if ('@greasemonkey.mozdev.org/greasemonkey-service;1' in Components.classes) {
+				let service = Components.classes['@greasemonkey.mozdev.org/greasemonkey-service;1'].getService().wrappedJSObject;
+				if (service && service.__proto__._openInTab) {
+					let _openInTab = service.__proto__._openInTab;
+					if (_openInTab.toSource().indexOf('TreeStyleTabService') < 0) {
+						service.__proto__._openInTab = function() {
+							let contentWindow = arguments[0];
+							let chromeWindow = arguments[1];
+							chromeWindow.TreeStyleTabService.readyToOpenChildTabNow(contentWindow);
+							return _openInTab.apply(this, arguments);
+						};
+					}
 				}
 			}
 		}