Like FF4 beta but tired with its non-stop feedback request? Wanna remove it?
It pretty simple actually. I was seriously LOL when I discover this one. That feedback thinggy actually is a FF extension (aka add on). So remove it from add on panel (or stop it) and you are good to go.
Click on Firefox orange button (top left) –> Add Ons –> Click on Disable or Remove at Feedback 1.0.x.