This extension is a utility app which prevents you from closing Safari accidentally with command+Q shortcut and loosing your unsaved work.
Here are 4 more promo codes to download the extension for free:
NAMJE9NRRH3M
ARRM4P4HFK9H
YTKKYAKFPKJR
7THYALFKXX66
I just made a free version of Tab Finder for Safari, which is an extension to help Safari users to switch between tabs faster with a shortcut similarly to Command+Shift+A shortcut on Google Chrome.
Default shortcut is Option+Tab, but you can change it.