Remove 'Add Another Tweet'

Remove the annoying 'Add Another Tweet' balloon.

Remove the annoying balloon which hide your sentences when you are entering tweet.
After installing this extension, the naughty balloon will never shows up again.

（After installing, if you have already opened twitter, please reload.）

If you have problem with this extension, please inform.
I'll deal with it within the possible range.

（firefox version：http://qq2q.biz/svuF）