Include more favicon sizes.

src/views/layout.jade

@@ -7,7 +7,12 @@ html(ng-app="netStatsApp")
     style(type="text/css") [ng\:cloak], [ng-cloak], [data-ng-cloak], [x-ng-cloak], .ng-cloak, .x-ng-cloak { display: none !important; }
     link(rel='stylesheet', href='https://fonts.googleapis.com/css?family=Source+Sans+Pro:200,300,400,600,700')
     link(rel='stylesheet', href='/css/netstats.min.css')
-    link(rel='shortcut icon', href='/mix-logo-thick.svg', type='image/x-icon')
+    link(rel='shortcut icon', href='/mix-logo-thick.svg', sizes='any' type='image/svg+xml')
+    link(rel='shortcut icon', href='/mix-logo-thick-1024.png', sizes='1024x1024' type='image/png')
+    link(rel='shortcut icon', href='/mix-logo-thick-512.png', sizes='512x512' type='image/png')
+    link(rel='shortcut icon', href='/mix-logo-thick-256.png', sizes='256x256' type='image/png')
+    link(rel='shortcut icon', href='/mix-logo-thick-128.png', sizes='128x128' type='image/png')
+    link(rel='shortcut icon', href='/mix-logo-thick-64.png', sizes='64x64' type='image/png')
   body
     block content