Whenever a user creates a new tab in Firefox, which usually is done by pressing CTRL T, the tab that appears is completely blank and does not provide any information whatsoever. Now this is different if you middle-click a link or bookmark because this action will load the website under the link in the new tab automatically.
A blank tab however is not useful at all. A better solution would be to open another website or service in the blank tab, something that is quick to load, is usually the right choice and does not delay the process for to long if the user wants to do something different with the tab.
A tab is usually created when the user wants to open a new url or search for something. He could do CTRL T and enter the url that he wants to visit. What if he uses a search engine most of the time that way? What if the search engine could be loaded automatically when a new tab is created?

