2013-12-17 Tile Tabs Firefox https://addons.mozilla.org/ja/firefox/addon/tile-tabs/ http://fxwiki.blog63.fc2.com/blog-entry-254.html めも Fox Splitter http://piro.sakura.ne.jp/xul/foxsplitter/#features https://addons.mozilla.org/ja/firefox/addon/fox-splitter/ めも、未評価