Transparent aluminum oxide (TAlOx), a real material despite its sci-fi name, is incredibly hard and resistant to scratches, making it perfect for protective coatings on electronics, optical sensors, and solar panels. On the sci-fi show Star Trek, it is even used for starship windows and spacefaring aquariums.
Tap the button to the left of the refresh button (top right), you should then be able to tap something like “open reader” which does a decent job at blocking intrusive ads