need help with youtube

it just started happening recently and only on firefox. this comes up when i press upload and go to the upload page:

idk whats rong. it is like that no matter what. i cant do anything. the upload button doesnt work. the only 1 that does is cancell and this is what happens when i press that:

if any1 knows how to solve this problem, i would appreciate the help.
Answer #1
You did put on a title?