Is their some kind of addon that warns people about url that look the simular? That might be easy and useful. Edit: With certificate pinning you could put out

Is their some kind of addon that warns people about url that look the simular? That might be easy and useful. Edit: With certificate pinning you could put out a msg to the User to verfiy if he understands that this is the first time he visits the site. The problem is when to put out such a warning, i dont want to do that every time I go on a new site.