My favorite keyboard shortcut of all time (and it works on every browser)
Briefly

In a world where multitasking and multiple browser tabs are commonplace, accidentally closing tabs can be a frustrating experience. However, there's a simple solution: the keyboard shortcut Ctrl+Shift+T for Windows and Cmd+Shift+T for Mac users, which allows them to recover the most recently closed tab. This can be repeated to restore earlier closed tabs and even repopulate entire windows of tabs that were previously closed, making it an invaluable tool for ensuring that important tasks aren't lost.
The greatest keyboard shortcut of all time does exist: Ctrl+Shift+T for Windows or Cmd+Shift+T for Mac, allowing users to recover recently closed tabs.
Accidentally closing a window full of tabs is no longer a catastrophe; simply open a new window and press Ctrl+Shift+T to restore every old tab.
Read at ZDNET
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