There was a time when our browsers could only show us one website at a time, which introduced us all the 'back' button. Fortunately, browsers evolved to allow multiple websites to be opened through the use of tabs. All this goodness comes with a cost in memory and performance if you get carried away, so keeping the tabs to a minimum is a good thing to do. This good housekeeping attempt can lead to accidentally closing the wrong tab with so many to choose from. If you're still going through the laborious process of searching the history log to find the site that you didn't mean to close, this tip is for you. No matter which flavor of browser you use, in Windows the 'Ctrl-Shift' combined with the letter T or in the macOS the 'Command-Shift-T' will reopen the last tab that got closed. This can be so efficient, especially for a tab that you may have opened long ago. I've often used it in succession to open many browsers that I may have closed to get back to some info that I suddenly need. Give it a try!