ua.match(/CriOS\/([\d.]+)/),
firefox = ua.match(/Firefox\/([\d.]+)/)
// Todo: clean this up with a better OS/browser seperation:
// - discern (more) between multiple browsers on android
// - decide if kindle fire in silk mode is android or not
// - Firefox on Android doesn't specify the Android version
// - possibly devide in os, device and browser hashes
if (browser.webkit = !! webkit) browser.version = webkit[1]
if (android) os.android = true, os.version = android[2]
if (iphone) os.ios = os.iphone = true, os.version = iphone[2].replace(/_/g, '.')
if (ipad) os.ios = os.ipad = true, os.version = ipad[2].replace(/_/g, '.')
if (webos) os.webos = true, os.version = webos[2]
if (touchpad) os.touchpad = true
if (blackberry) os.blackberry = true, os.version = blackberry[2]
if (bb10) os.bb10 = true, os.version = bb10[2]
if (rimtabletos) os.rimtabletos = true, os.version = rimtabletos[2]
if (playbook) browser.playbook = true
if (kindle) os.kindle = true, os.version = kindle[1]
if (silk) browser.silk = true, browser.version = silk[1]
if (!silk && os.android && ua.match(/Kindle Fire/)) browser.silk = true
if (chrome) browser.chrome = true, browser.version = chrome[1]
if (firefox) browser.firefox = true, browser.version = firefox[1]
os.tablet = !! (ipad
关键词：zepto是啥