As reported by Open Culture:
Last fall, we let you know that Caltech and The Feynman Lectures Website joined forces to create an online edition of The Feynman Lectures on Physics. They started with Volume 1. And now they’ve followed up with Volume 2 and Volume 3, making the collection complete...More at the link. The image is my screencap of part of one of the pages.
The new online edition makes The Feynman Lectures on Physics available in HTML5. The text “has been designed for ease of reading on devices of any size or shape,” and you can zoom into text, figures and equations without degradation.