There is a way around that. If you have Google Chrome, right click on the image. Scroll down to "inspect". That will open up a box at the bottom of the screen with a bunch of technical mumbo jumbo. Inside of that box there will be two jpg links, one for the small size and one for the large size. Copy and paste the link address into your browser's location bar. Those will be jpg files instead of html files.
Also, you should still be able to download it in whatever size you want. You may not be able to right click and save as usual, but as soon as you put your cursor over the image, three little symbols show up in the bottom right next to the photo. The third symbol is to download it. Click that, and it'll say "view all sizes" - that takes you to a second page with all links to the different sizes. Now, you can't actually right click and save the image, but you can right click and "inspect" on those. Then you can grab the jpg link and paste it into another location bar.
This one is 884x1600
https://c1.staticflickr.com/9/8356/2...bf9252f6_h.jpg