How can I get rid of the stupid Twitter thing at the bottom of your web page that takes up my browser space ?
On the right side of the bar there is an icon that looks like two downward arrows. Click it to minimise the bar. (I hadn't noticed it until I read your question...)
Are you talking about the Tell Friends bar? You can use NoScript to get rid of it, it's a Firefox extension.
look to the far right of the blue bar. There is an icon that is of two arrows pointing down. Click it. Does this help?