Shoutbox

i startup my ocmputer this mornin only to find that my firefox has gone all wierd. everything has been set to default, all my bookmarks have been lost and every webpage i go on, it shakes
as i am typing this right now the page is shakin. its just the page itslef as in the buttons at the top of the browser arent shakin and the bar at the bottom which shwos the loading of the page isnt either

i reinstalled but still no luck

HELPP