Firefox 4.0 was released hardly some months ago and now Firefox 5.0?

They have gone crazy

http://www.mozilla.com/en-US/firefox/5.0/whatsnew/
WaReZ Reviewed by WaReZ on . Firefox 5.0 Firefox 4.0 was released hardly some months ago and now Firefox 5.0? They have gone crazy http://www.mozilla.com/en-US/firefox/5.0/whatsnew/ Rating: 5