Bug 1701306 - Remove custom code setting the "open" attribute on panel anchors. r=mconley

Differential Revision: https://phabricator.services.mozilla.com/D110817

browser/base/content/browser-places.js

@@ -96,9 +96,6 @@ var StarUI = {
           let { selectedFolderGuid, didChangeFolder } = gEditItemOverlay;
           gEditItemOverlay.uninitPanel(true);
 
-          this._anchorElement.removeAttribute("open");
-          this._anchorElement = null;
-
           let removeBookmarksOnPopupHidden = this._removeBookmarksOnPopupHidden;
           this._removeBookmarksOnPopupHidden = false;
           let guidsForRemoval = this._itemGuids;
@@ -299,9 +296,6 @@ var StarUI = {
 
     this.beginBatch();
 
-    this._anchorElement = BookmarkingUI.anchor;
-    this._anchorElement.setAttribute("open", "true");
-
     let onPanelReady = fn => {
       let target = this.panel;
       if (target.parentNode) {
@@ -326,7 +320,7 @@ var StarUI = {
       isNewBookmark: this._isNewBookmark,
     });
 
-    this.panel.openPopup(this._anchorElement, "bottomcenter topright");
+    this.panel.openPopup(BookmarkingUI.anchor, "bottomcenter topright");
   },
 
   _createPanelIfNeeded() {