Sometimes I come across a usability gem in an application that just seems so obvious once I've found it. This time it was the Ctrl-Back combination in Firefox (it may exist in other browsers but I haven't tested it yet).

You may be aware that holding down the Ctrl button whilst clicking on a link in Firefox will open the link in a new tab, which means you keep the page you're on open. When searching for something on Google, say, I often find myself arriving at a page and then needing to keep it open whilst I continue the search. I use to open a new tab, paste in the URL and then go back to the original tab and click back to return to the Google results page. To be honest a bit of a faff. However, it turns out that if you hold down the Ctrl button when clicking the back button Firefox will open the previous page in a new tab, saving me the trouble of doing this manually. A really nice touch.