HihiBox is a Chrome add-on developed by HihiBox that provides various features for multiple streaming platforms including Hitbox.tv, Twitch.tv, Ustream.tv, Streamup.com, and LIVEhouse.in. With this add-on, users can input specific codes in the chatroom of these platforms to display Highde icon and receive channel opening notifications.

Please note that HihiBox is an unofficial add-on developed independently, and the developer does not guarantee continuous updates for the plugin. Users are allowed to modify or enhance the add-on, but it is required to credit the original author. The add-on collects user data for future evaluation and updates.

Overall, HihiBox is a useful tool for users of multiple streaming platforms who want to enhance their chatroom experience with custom codes and Highde icons.