The Edit filter is a tool used to allow trusted users to set specific controls on user activity and create automated reactions for certain behaviors. The Abuse Filter extension was developed by Werdna with support from the Wikimedia Foundation, and went live on the [[wikipedia:|English Wikipedia]] in March 2009. As of July 2009, nearly all user-facing elements of the filter refer to it as the Edit filter as not all the edits it flags are abusive. In the software and special pages it retains its original name.