The documents on this site are designed to be a reference source and to provide a starting point to learn about a topic. Hyperlinks are included to help you see the connections between different topics and to the underlying principles.
Hypermedia is quite different from learning from a textbook.
Clicking every hyperlink is not an efficient method of learning. After getting an introduction to the topic that you are studying, find a more in-depth source of information to study. These tutorials have additional user notes. There is significant variability in current and previous versions of browsers. Most documents should display properly but some might not.