Redirected from a particular website to -js-sec.indexww.com resulting in landing at -OPTMD.com,
a website under construction, not crawable by any bot, not indexable. (23.220.136.252) on -CDN.Akamai,
running on Apache P3P, MISS from browser (squid/3.5.12). Leaves no gtraces in your history nor browser-cache.
Site indexable by Googlebot, so so-called “cloaking” going on here.
See: https://sitereport.netcraft.com/?url=https://js-sec.indexww.com
& https://urlscan.io/result/a43ac68d-5404-4afe-b158-3e4429633038/
ZenMate fw blocks going to -optmd.com as classified under ads.
Also blocked by uBlock Origin.
Always interesting to find out what may go on at the other site of your device-screen 
Have a nice and peaceful week, ye all.
polonus