This is stupid. You cannot enable or disable WebRep from the Firefox addon manager. The only thing it allows you to do is to disable the entire extension. What if I want to disable annoying WebRep but keep enabled the other features of the extension?
When it first installed it automatically launched a settings page. Since then I think an update to Avast overwrote my settings. I think that's what happened. I guess I'll just disable the entire extension, then, since Avast people insist on forcing this WebRep thing on me...