Reliably accessing public Wi-Fi "Agreement" page on Android
You can create a home screen shortcut that will do what you want. First bookmark your “hp.com”. I use “this.com. Then go to your bookmarks and long press the one you want. At the bottom of the pop up menu should be the option to “Add to Home Screen”. Select that.

Now, when you need to sign in on public Wi-Fi, just start your browser from the shortcut on your home screen. For me… Works every time!