About: http://webisa.webdatacommons.org/389734288

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Paid add-ons will have a difficult time competing with free add-ons, and I think only a few kinds of add-ons will make sense to be sold.
http://www.w3.org/ns/prov#wasQuotedFrom	mozilla.org