Add customizability for newly opened temporary groups (#537)

content/treestyletab/bookmarksOverlay.js

@@ -418,7 +418,7 @@ var TreeStyleTabBookmarksService = {
 					treeStructure = sv.getTreeStructureFromItems(aIDs, 0);
 					aURLs.unshift(sv.getGroupTabURI({
 						title:     aFolderTitle,
-						temporary: true
+						temporary: TreeStyleTabUtils.getTreePref('openGroupBookmark.temporaryGroup')
 					}));
 				}
 			}

defaults/preferences/treestyletab.js

@@ -395,6 +395,7 @@ pref("extensions.treestyletab.dropLinksOnTab.behavior", 0);
  *  1 | 512        = Open as a new tree, as a flat group.
  */
 pref("extensions.treestyletab.openGroupBookmark.behavior", 2304); /* 0 | 256 | 2048 */
+pref("extensions.treestyletab.openGroupBookmark.temporaryGroup", true);
 /**
  * How to treat tabs dropped to the Bookmarks menu or Bookmarks toolbar.
  *  0 = Always ask how bookmark the tree.
@@ -617,6 +618,7 @@ pref("extensions.multipletab.show.multipletab-selection-item-createSubtree", tru
  * the first selected tab becomes the parent.
  */
 pref("extensions.treestyletab.createSubtree.underParent", true);
+pref("extensions.treestyletab.createSubtree.underParent.temporaryGroup", true);
 
 /**
  * Size of pinned tabs in the vertical tab bar.

modules/window.js

@@ -1350,7 +1350,9 @@ TreeStyleTabWindow.prototype = {
 		);
 
 		var root = utils.getTreePref('createSubtree.underParent') ?
-					b.addTab(this.getGroupTabURI({ temporary: true })) :
+					b.addTab(this.getGroupTabURI({
+						temporary: utils.getTreePref('createSubtree.underParent.temporaryGroup')
+					})) :
 					aTabs.shift() ;
 		var self = this;
 		this.Deferred.next(function(self) {