Firefox Youtube Player Resizes???

Why is my YouTube Player suddenly large by default? How can I change it back to the smaller default size? There's only Theatre Mode Option and Fullscreen Option, no Small option.
I have tried
-Fully Uninstalling Firefox 30.0
-Fully Uninstalling Adobe Flash
-Restart Computer
-Install both programs

It is still the large video size? Can anyone help me, I don't like the large size youtube player. I'm guessing there is a setting somewhere in the registry?

Win7Ultimatex64 SP1

logicearth said:

Its YouTube itself, they changed their layout.

So there's no actual way to make it back to default again?

dfg555 said:

logicearth said:

Its YouTube itself, they changed their layout.

So there's no actual way to make it back to default again?

You can use youtube center or another userscript to autoresize it.

If you can find the css code, you can change it by making a userstyle.