Samsung Internet Browser for Gear VR released an update that allows you to have a skybox while browsing on a page. It appears experimental and the only feature in their web developer guide.
I love the idea behind this. It gives the reader additional context of a page. You’re not only reading an article but you’re experiencing it too. I decided to try this for myself on whywaittoseetheworld.com.
I released this as a plugin. Feel free to try it out yourself. Keep in mind that it will only work on the Samsung Internet Browser for Gear VR. I hope this can become standardized to support all HMD’s in the future.