I may be completely daft, however I cannot access the editable profile. For a start, it looks like the demo is done on a Mac and I am on Windows using the up-to-date Chrome browser. So, all the things on the left of the page are not there for me. All I get is the regular edit window. There is nothing like the example. When I edit my About and highlight some text, that is all it is - hightlighted. No popup for bold, etc.

Does this feature work on PCs?