Replying to Newschoolers and firefox?

Is there any specific reason why i cant embed videos, or link anything or insert media while on NS in Firefox? I do not get any windows for embedding or inserting media. I've tried turning off pop-up blocker and when i need to i try to use internet explorer (ie7 i believe). but with explorer i get the pop up for embedding video, i put in the embed code and press add video, but it does not appear in my post.

any help would be appreciated