Remove Group Damage Notifications

Remove Group Damage Notifications is a simple CSS style that hides damage and buff notifications in the Party chat. This is useful for active parties that want to chat without searching for conversations in a torrent of buff notices.

However, the extension has a critical bug: it also hides any chat messages in which the current user has been tagged (with the @username markup). This bug cannot be resolved at the moment, as the website applies the same style class to notifications and user-tagged messages.