This as been going for a long time but now needs sorting. My homepage is MSN and when I click onto a news article all is well but as soon as I scroll down the page (page will have a video running on silent until a switch volume on) the Large video goes small and moves to the right of my screen i.e like a picture in picture, this feature is very very annoying . I thought it was the MSN site but just tried it on Chrome and Safari and it does not do the same so must be a firefox problem . I am a macbook pro user running latest os I like the browser but feel the need to go and use Chrome.