I hope somebody from the Firefox OS team reads this: most of their apps have "mystery buttons" where the only way to figure out what they do is to press them. I

I hope somebody from the Firefox OS team reads this: most of their apps have "mystery buttons" where the only way to figure out what they do is to press them. It took me 3 tries to find out which button to use to write a new tweet on their tweeter app. On a related note a while ago we were discussing this new generation of kids will probably never come across a floppy disk, yet it's almost a UI convention to use the floppy icon for the Save function. EDIT: Grammar