Explanation

The keyboard shortcut to close a tab on a browser is Ctrl + W.

Here are some other keyboard shortcuts for browsers:

• Ctrl + T: Opens a new tab
• Ctrl + N: Opens a new window
• Ctrl + Shift + W: Closes the current window and all tabs
• Ctrl + Q: Closes the current window
• Alt + Right arrow: Opens the next page from your browsing history in the current tab
• Ctrl + F4: Closes the current tab
• Alt + F4: Closes the active window
• Alt + Space then n: Minimizes the current window