Online Blockly - Out of Order?

1. In the past I could upload (Open) a bloc-file from my computer, that doesn't work now.

2. There two kinds of scrollbars in the browser (firefox), the (visible) orange one is for moving the sketch left / right. But at startup there is no one for moving the sketch up/down.

Now there is a grey one too to move the blockly frame in the browser. You have to move the frame to the left, to see the orange scrollbar for sketch moving up/down. No matter how big the browser window is, the Blockly frame is always bigger.