http://getnews.jp/archives/340484

http://gigazine.net/news/20130514-firefox21/

http://news.livedoor.com/article/detail/7672258/

http://matome.naver.jp/odai/2136860875354072401

http://www.tokyo-np.co.jp/article/saitama/20130516/CK2013051602000142.html

http://kounomaki.blog84.fc2.com/blog-entry-683.html

http://headlines.yahoo.co.jp/hl?a=20130515-00000710-yom-soci