The idea came from some comments I saw a couple days ago. The gist was that because very few people actually check /newest, getting a story out of /newest usually requires an upvote ring, existing fame, or luck. I'm hoping that by including new stories on the front page, I'll get myself to check them out and upvote them more often than I currently do.
The extension chooses stories at random from /newest and includes them on your front page. The stories get re-chosen every fifteen minutes. You can upvote them from the front page just like you would from /newest.
Links to the extension are in the repo!