Think of “mobile first” companies, and Instagram should top that list. It rose to prominence as one of the fastest-growing mobile-only companies over the past few years, and is now closing in on the 100 million active user mark. Kevin Systrom put it best: “Our focus on building out a mobile-only experience is a unique path that we’ve chosen for many reasons, most important of which is that Instagram, at its core, is about seeing and taking photos on-the-go,” he wrote in a blog post on Tuesday. But now, a little over two years later, the mobile-centric app is beefing up its Web presence. Instagram announced on Tuesday that users can now view their stream feed of photos from the Web, which includes all those being uploaded by the people they follow on the service. Pretty straightforward, in that in the past two years you were only able to see your real-time stream flow in through the company’s Android or iOS apps.