Find out how much it costs for someone to use your site on mobile networks around the world. Prices are based on the largest operator’s cheapest data plan in each country.
Sites served up over HTTPS don’t pass referrer strings on to third-party sites using regular HTTP. If you want these strings to be passed, there’s a way to force it in Chrome (only).
TLS is not mandatory for HTTP/2 but representatives from both the Firefox and the Chrome development teams have expressed their intents to only implement HTTP/2 over TLS.