Firefox features a built-in capability that allows you to reopen closed tabs. You can either open the Firefox recently closed tabs or all closed tabs in the order in which they were closed.
Steps to reopen accidentally closed tabs on Firefox :
- In Mozilla Firefox, right-click on the tab bar and select Undo Close Tab from the popup menu to reopen the previously closed tab.
- To open the previously closed tab, use the Firefox keystroke shortcut Ctrl + Shift + T on your keyboard.