diff --git a/content/treestyletab/treestyletab.js b/content/treestyletab/treestyletab.js
index 477a2416..d8620264 100644
--- a/content/treestyletab/treestyletab.js
+++ b/content/treestyletab/treestyletab.js
@@ -718,54 +718,53 @@ catch(e) {
 			return;
 		}
 
-		if (draggedTab)
-			return;
-
-		// dropping of urls
-		var url;
-		for (let i = 0; i < tabbar._supportedLinkDropTypes.length; i++) {
-			let dataType = tabbar._supportedLinkDropTypes[i];
-			let isURLList = dataType == 'text/uri-list';
-			let urlData = dt.mozGetDataAt(isURLList ? 'URL' : dataType , 0);
-			if (urlData) {
-				url = transferUtils.retrieveURLFromData(urlData, isURLList ? 'text/plain' : dataType);
-				break;
-			}
-		}
-
-		if (!url || !url.length || url.indexOf(' ', 0) != -1 || /^\s*(javascript|data):/.test(url))
-			return;
-
-		nsDragAndDrop.dragDropSecurityCheck(aEvent, sv.getCurrentDragSession(), url);
-
-		var bgLoad = this.getPref('browser.tabs.loadInBackground');
-		if (aEvent.shiftKey) bgLoad = !bgLoad;
-
-		var tab = sv.getTabFromEvent(aEvent);
-		if (!tab || dt.dropEffect == 'copy') {
-			sv.performDrop(dropActionInfo, b.loadOneTab(getShortcutOrURI(url), { inBackground: bgLoad }));
-		}
-		else {
-			let locked = tab.getAttribute('locked') == 'true';
-			let loadDroppedLinkToNewChildTab = dropActionInfo.position != sv.kDROP_ON || locked;
-			if (!loadDroppedLinkToNewChildTab &&
-				dropActionInfo.position == sv.kDROP_ON)
-				loadDroppedLinkToNewChildTab = sv.dropLinksOnTabBehavior() == sv.kDROPLINK_NEWTAB;
-
-			try {
-				if (loadDroppedLinkToNewChildTab || locked) {
-					sv.performDrop(dropActionInfo, b.loadOneTab(getShortcutOrURI(url), { inBackground: bgLoad }));
-				}
-				else {
-					tab.linkedBrowser.loadURI(getShortcutOrURI(url));
-					if (!bgLoad)
-						b.selectedTab = tab;
+		if (!draggedTab) {
+			// dropping of urls
+			var url;
+			for (let i = 0; i < tabbar._supportedLinkDropTypes.length; i++) {
+				let dataType = tabbar._supportedLinkDropTypes[i];
+				let isURLList = dataType == 'text/uri-list';
+				let urlData = dt.mozGetDataAt(isURLList ? 'URL' : dataType , 0);
+				if (urlData) {
+					url = transferUtils.retrieveURLFromData(urlData, isURLList ? 'text/plain' : dataType);
+					break;
 				}
 			}
-			catch(e) {
+
+			if (!url || !url.length || url.indexOf(' ', 0) != -1 || /^\s*(javascript|data):/.test(url))
+				return;
+
+			nsDragAndDrop.dragDropSecurityCheck(aEvent, sv.getCurrentDragSession(), url);
+
+			var bgLoad = this.getPref('browser.tabs.loadInBackground');
+			if (aEvent.shiftKey) bgLoad = !bgLoad;
+
+			var tab = sv.getTabFromEvent(aEvent);
+			if (!tab || dt.dropEffect == 'copy') {
+				sv.performDrop(dropActionInfo, b.loadOneTab(getShortcutOrURI(url), { inBackground: bgLoad }));
 			}
+			else {
+				let locked = tab.getAttribute('locked') == 'true';
+				let loadDroppedLinkToNewChildTab = dropActionInfo.position != sv.kDROP_ON || locked;
+				if (!loadDroppedLinkToNewChildTab &&
+					dropActionInfo.position == sv.kDROP_ON)
+					loadDroppedLinkToNewChildTab = sv.dropLinksOnTabBehavior() == sv.kDROPLINK_NEWTAB;
+
+				try {
+					if (loadDroppedLinkToNewChildTab || locked) {
+						sv.performDrop(dropActionInfo, b.loadOneTab(getShortcutOrURI(url), { inBackground: bgLoad }));
+					}
+					else {
+						tab.linkedBrowser.loadURI(getShortcutOrURI(url));
+						if (!bgLoad)
+							b.selectedTab = tab;
+					}
+				}
+				catch(e) {
+				}
+			}
+			aEvent.stopPropagation();
 		}
-		aEvent.stopPropagation();
 	},
    
 	overrideGlobalFunctions : function TSTService_overrideGlobalFunctions()