Undo Close Tab Replacement is a web application that helps users recover closed tabs in their browser. It is designed to allow users to easily access the webpages they have recently closed. It works by storing a history of the tabs and windows that have been opened and closed, and when the user requests to undo a close, it will restore the tab or window to its previous state. The application can also be used to quickly switch between multiple open tabs or windows. It also supports a range of popular browsers, including Chrome, Firefox, Safari, and Edge.
It's an all-in-one tab management tool. I wish it was still supported and available for Firefox 57+.