nofollow -> noreferrer and link to multipage HTML
nofollow -> noreferrer and link to multipage HTML

r=@mathiasbynens
andreasbovens/devopera,operasoftware/devopera,andreasbovens/devopera,operasoftware/devopera,operasoftware/devopera,shwetank/devopera,shwetank/devopera,operasoftware/devopera,andreasbovens/devopera,shwetank/devopera