HTC typically puts their core applications on the Play Store for easy updates in between OTA rollouts, and the latest to get the treatment is HTC Internet, the web browser found on many of their devices. This release doesn't really add any features that weren't already present on the phones out of the box, but it'll be useful for bug fixes and the like later on.
If you're interested, you can find the app at the link below.
How many of you use your device's default browser over Chrome?
Play Store Download Link