SHOWROOM IDビューア is a Chrome add-on that displays user IDs on the live streaming service SHOWROOM. This tool simply shows the user number in the top right corner of the SHOWROOM viewing page along with the user's nickname. It is important to note that this user ID is separate from the private user ID used for login.

When viewing a user's profile on SHOWROOM, this add-on conveniently displays their user number and nickname. This information is unique and unchangeable for each account, meaning that even if different nicknames are displayed, if the user numbers are the same, they belong to the same account. Conversely, if the nicknames are the same but the user numbers are different, they are separate accounts with the same name.

In addition to the visual display, the add-on also outputs the same information to the Console. This can be useful for copying multiple pieces of information at once. The Console log can be accessed by opening the Service Worker link in the add-on's management page and selecting the Console tab. It's important to note that the Console log is temporary and not saved locally.

Please note that there may be instances where the add-on experiences some performance issues depending on the environment. However, keeping the Service Worker page open can help alleviate these issues.