Hello LeMerle, What site do you wish Firefox to start up on? If you want to start up Firefox on another website, you can surf to the website that you want to see when you launch Firefox, then click Tools on the top menu, choose Options, and make sure you are on the General Tab. You should see Homepage: with your wife's Yahoo link. Underneath that, click Use Current Page and you should see it change the launch link to your own preference, as long as you surfed to your own website first. (You can also just type it into this field). If you want to use Yahoo, but want to be logged into your account, you can log out of your wife's account and log in to your own. If you set Firefox to remember your password it can log you in automatically. (It should already be set that way if it is logging you into your wife's account). Hope this helps.