Most common HTML HEAD content. PUG version

common_HTML_HEAD_METAs.pug

// most restricted user zoom possibilities
meta(name="viewport", content="width=device-width, initial-scale=1, viewport-fit=cover, maximum-scale=1.0, user-scalable=no")
// iOs safari kick-ass
meta(name="apple-mobile-web-app-capable", content="yes")
meta(name="apple-mobile-web-app-status-bar-style", content="black-translucent")
// detections in mobile Chrome & FF are on by default
// following directives helps to switch them off
// in some desktop browsers (webkit & FF) can be switched on
meta(name="format-detection", content="telephone=yes")
meta(name="format-detection", content="address=yes")

ms_specifical.pug

// leverage to the most recent IE renderer 
meta(http-equiv='X-UA-Compatible', content='IE=edge')
// use native MS font smoothing alhorithms, mostly more perfect look on Windows and with MS browsers 
meta(http-equiv='cleartype', content='on')
// must have things to pin websites in windows8 and windows10 
link(rel='manifest', href='/img/icons/manifest.json')
meta(name='msapplication-TileColor', content='#000055')
meta(name='msapplication-TileImage', content='/ms-icon-144x144.png')
meta(name='theme-color', content='#000055')

web_and_mobile_icons.pug

// Apple
link(rel="apple-touch-icon" sizes="57x57" href="/img/icons/apple-icon-57x57.png")
link(rel="apple-touch-icon" sizes="60x60" href="/img/icons/apple-icon-60x60.png")
link(rel="apple-touch-icon" sizes="72x72" href="/img/icons/apple-icon-72x72.png")
link(rel="apple-touch-icon" sizes="76x76" href="/img/icons/apple-icon-76x76.png")
link(rel="apple-touch-icon" sizes="114x114" href="/img/icons/apple-icon-114x114.png")
link(rel="apple-touch-icon" sizes="120x120" href="/img/icons/apple-icon-120x120.png")
link(rel="apple-touch-icon" sizes="144x144" href="/img/icons/apple-icon-144x144.png")
link(rel="apple-touch-icon" sizes="152x152" href="/img/icons/apple-icon-152x152.png")
link(rel="apple-touch-icon" sizes="180x180" href="/img/icons/apple-icon-180x180.png")
// Android
link(rel="icon" type="image/png" sizes="192x192"  href="/img/icons/android-icon-192x192.png")
// Common web, order is important!!!
link(rel="icon" type="image/png" sizes="32x32" href="/img/icons/favicon-32x32.png")
link(rel="icon" type="image/png" sizes="96x96" href="/img/icons/favicon-96x96.png")
link(rel="icon" type="image/png" sizes="16x16" href="/img/icons/favicon-16x16.png")
// MS Windows 8/10/Mobile
link(rel="manifest" href="/img/icons/manifest.json")
meta(name="msapplication-TileColor" content="#000055")
meta(name="msapplication-TileImage" content="/ms-icon-144x144.png")
meta(name="theme-color" content="#000055")