Instagram's web version has usually played second fiddle to its phone apps. While you could check out photos or look at your notifications, you weren't going to use it in place of native software. You might want to take a second look, though, as Instagram has upgraded its mobile website to add some of the core features that you take for granted in the app. The social network quietly added photo sharing in March, and just introduced the Explore tab. You still can't apply filters, post videos, handle direct messages or view Stories, but all the basics are there.