Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: Co-Founder and CEO of Vivaldi  Jon Von Tetzchner  poses for a photo during the Web Summit  Europe's biggest tech conference  in Lisbon  Portugal  November 9  2017. REUTERS/Pedro Nunes
Co-Founder and CEO of Vivaldi  Jon Von Tetzchner  talks with a Reuters reporter during the Web Summit  Europe's biggest tech conference  in Lisbon  Portugal  November 9  2017.  REUTERS/Pedro Nunes
  He  has since launched Vivaldi  which includes functions  he  says bigger browsers lack. Vivaldi.net does not track searches and is based on an online community of users who recommend features   he  said.
Co-Founder and CEO of Vivaldi  Jon Von Tetzchner  talks with a Reuters reporter during the Web Summit  Europe's biggest tech conference  in Lisbon  Portugal  November 9  2017.  REUTERS/Pedro Nunes
Google (GOOGL.O)  dominates the online advertisement market and  it  closed Vivaldiâs advertising account. Google partnered Opera before launching the Chrome browser in 2008.
 He  said  he  was increasingly concerned about data collection and tracking by tech giants like Google and Facebook.

Founder of web browser Opera says worried about online privacy