=== Test Firefox Back-Forward doesn't break wysiwyg mode ===
 1. The page should be first loaded successfully without any error.';
 1. Navigate the browser to an new URL;
 1	. Press 'Go Back One Page' Button or press 'Alt+Arrow Let' key to navigate back to CKEditor page.
 1	. Click inside the editing area;
 * Expected Result: The cursor is blinking and you are able to start typing.