StumbleUpon By Brookelarissa94 Nov 14, 2001 StumbleUpon was born Dec 24, 2002 1 000 000 Users!!! Dec 13, 2006 StumbleUpon launched their StumbleVideo site Feb 12, 2007 StumbleUpon launched a version of StumbleVideo for the Internet Channel Web browser Apr 23, 2007 StumbleThru service Allowing users of the toolbar to stumble within sites such as YouTube May 4, 2007 StumbleUpon was owned by Ebay Apr 24, 2009 Ebay gave up ownership Jun 13, 2011 Sites added to StumbleThru StumbleThru include BBC.com, Blogger, Break.com, CNN.com, Collegehumor, Flickr.com Aug 27, 2011 StumbleUpon reached 25 billion stumble mark Oct 15, 2011 StumbleUpon announced that is had crossed 20 million registered users of the service Oct 24, 2011 Ability to blog