favicon.ico 16x16 4-bit 16 color only
favicon.ico 16x16 4-bit 16 color only

16px used on all browsers
https://github.com/audreyr/favicon-cheat-sheet,
http://realfavicongenerator.net/faq#.Vpasouh96Hs

laukstein/ajax-seo,laukstein/ajax-seo