About: http://webisa.webdatacommons.org/57852723

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	Finding no answer to this issue in these support pages or elsewhere, I eventually thought that one of the add-ons such as NoScript might be preventing the changes I wanted to permanently make to the toolbar.
http://www.w3.org/ns/prov#wasQuotedFrom	mozilla.org