Recently active topics in Mozilla Corporation tagged with google

I don't know if this is a Firefox question or an add on question - When I click on a link from google with the left click button, the link opens in a new tab, just like I want it to BUT it brings the new tab to the front. I want the tab to open behind the google tab while I keep looking. I can, of course, click on the google tab again, but it seems to me there should be a way to have the new tab open behind the google page by default. (That is what I have my Firefox preferences set to.) Does anyone know how I can do this?