VRCFriendCheck is a browser extension developed by mnao305 for Chrome that allows users to check the online status of their friends in VRChat. With this extension, users can receive notifications when their friends come online and easily join the same instance as their online friends.

The main features of VRCFriendCheck include confirming the online/offline status of friends, receiving notifications when friends come online, and checking the instance where online friends are located. Users can also sort their friends by name or instance ID and display only their favorite friends. Additionally, the extension displays the number of friends online directly on its icon.

To use VRCFriendCheck, users need to log in with their VRChat account. It's important to note that the extension does not send or store account information on any servers other than those related to the extension and VRChat official services.

Please be aware that the VRChat API used in this extension is based on unofficial documentation, and it is unclear whether access to this API is officially granted. Therefore, users should use this extension at their own risk, as the developer is not responsible for any damage caused by its use.