@Technologx : I used to have the same issue, in chrome, but it wasn't like yours, in my case it was because, in the admin panel, all components were loading one by one, so this used to pop up, once everything was loaded, it disappeared, and the admin panel would seem just the way it should.
But for mozilla, it used to be there always, so my guess, just try loading in another browser, and clear cache of your mozilla too.
It should help.
Good luck