When I open firefox on my android, a new tab opens up. In the old version when I clicked on the address bar and typed in a search or address, it used the same tab without opening a new one. With this new version, if I don't pay attention, I have like six tabs open. How can I change this so I can use the same tab and not have all these open tabs that I am no longer using? I know I can manually go close the tabs but this is annoying!