Instagram has at last redesigned its photo viewing pages to be a lot more interactive. It's a big step forward for Instagram on the web front. Before it's actually been quite embarrassing because there were third parties who were making Instagram on the web better than even they were.
With this new update Instagram has added, you can now like, comment and follow people directly from the browser. But it stops there. You can't do anything else, you can't browse other peoples photos, you can't browse previous photos of the person's photo you're looking at and you can't upload any photos.
So this update only changes the photo viewing pages. That's it. C'mon Instagram, you can do better than this, especially if you're worth 1 billion freakin' dollars.