For Mac OS users, there is a system setting that may not allow you to tab onto several types of elements in a web page. To change this setting:
BOLDNESS
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam massa urna, malesuada at dolor pulvinar, scelerisque sagittis enim. Aenean vestibulum laoreet leo, in malesuada orci placerat sed. In id . . .