Fidelity's Danoff backs Facebook's response to content, privacy issues

FILE PHOTO: People are silhouetted as they pose with mobile devices in front of a screen projected with a Facebook logo, in this picture illustration October 29, 2014. REUTERS/Dado Ruvic/Illustration

Facebook Inc's  second-biggest outside investor has offered backing for the world's largest social media company as it faces public criticism for what people see on its service and how much user information is shared with third parties. 

Comments by Fidelity Contrafund's Will Danoff, who like other top mutual fund managers rarely voices an opinion about a holding, represent key support for management as some investors seek change at Facebook, but also drew criticism that he should take a tougher line.