Infinite tabs

Ever suddenly found you've closed all your tabs and windows and actually run out of things to do on your computer? How could this be when what seemed like yesterday you had countless Wikipedia articles, news stories, games, or serious pursuits open and waiting for you?

I say people should never have to experience that empty feeling of having run out of self-assigned tasks. Whenever the number of open tabs runs under the length of the tab bar, a browser extension should open a new page from Stumble Upon or from an RSS feed or from the "read it later" Firefox extension, or from old bookmarks (dig up old memories), or whatever.

Similarly, when the number of open windows falls too low, the computer could start up a random program-- possibly something you've downloaded and not tried yet, or maybe it could download something for you.