Please let me know what’s your WordPress version and which browser you are using?
WordPress v3.5.1
Firefox v19
On exactly the same system (WP 3.5.1 and Firefox 19), I can see the widget parameters normally. Please check this screen shot.
The screen shot seems to be coming off a widescreen monitor.
And what kind of monitor you have?
I have dual (full screen) monitors at 1600×1200.
As you can see from the screen shot, Hot Newsflash works fine on my Firefox v20. Please try to re-install the plugin from WordPress repository.
screen shot
Regards
Milos
And what kind of monitor you have?
It’s 24″ LCD monitor. But this is not related to monitor. You probably have outdated version of the plugin. Please re-install as I recommended to you.