http://lmgtfy.com/?q=Use+google+dnsWhats this.A link
For making Firefox faster? NoScript for blocking JavaScripts, and uBlock Origin for blocking ads and other URLs.
sunspider
Used this link
https://blog.dnsimple.com/2015/03/why-and-how-to-use-googles-public-dns/
Really it has made changes.Thanks for the help.