I hope this encourages Mozilla to focus more on page archiving support on the web. I feel as though they missed a huge opportunity by not making it easy to archive pages with DOM snapshots, or easy to snag videos or images. (Go to Instagram and try to right-click -> download the image; you can't.) Would have been a very good way to differentiate from Chrome, as Google wouldn't want that available for Youtube. And "our browser can download videos and images from anywhere" is pretty easy to sell for potential users.