A handy feature in Safari which you may not know about is Window > Merge All Windows. As the command name suggests, this command merges all the windows and tabs that are currently open in Safari into tabs in a single window.

Since I often control-click on a link in an interesting post while browsing my RSS feeds in Mail and choose Open Link behind Mail, I end up getting lots of windows open in Safari once I’ve finished reading my RSS feeds.

And so, the ability to merge all windows into tabs quickly and conveniently becomes a very important and useful one indeed!