I'm somewhat confused (easily done).
Where are you trying to do this, given you have posted in the Avast Cleanup sub-forum ?
Now I don't use Avast Cleanup, but I don't know how it would go about cleaning up a URL or what Add is meant to do.
If you are trying to clear browsing data, surely that would be done in your browser settings - Avast Secure Browser or whatever browser you use.