Hello, What about:config preference is causing the following new instance "firefox" button to appear in the taskbar right click context menu? reference: https://i.postimg.cc/DwQdCy3N/Context.jpg I have all of the following set to false: browser.taskbar.lists.enabled browser.taskbar.lists.frequent.enabled browser.taskbar.lists.maxListItemCount - 0 browser.taskbar.lists.recent.enabled browser.taskbar.lists.tasks.enabled browser.taskbar.previews.enable Initially the list was completely blank with the exception of "Close window" but I have made several changes and can't figure out what is now causing this.... Thanks in advance.