Welcome to the ClosingTime home page! This extension hides Close buttons on tabs which can't be closed because of the "Leave Page / Stay on Page" prompt. If a page shows a dialog with the message "This page is asking you to confirm that you want to leave - data you have entered may not be saved." then the user must choose to leave or stay within the tab - until then, the tab can't be closed. Hiding the close button helps indicate this, without forcing changing the focus to that tab.