Discovered Adblock Plus was not working on Chrome and had to uninstall and re-install it again to get it to work. Don't know if due to a Chrome update or Adblock update or if just me but thought I'd post as a warning to check it.
Boy, pages sure do eat data when it isn't working. Can see where customers who don't have an ad blocker installed eat a lot of data just browsing.
I do NOT use Chrome, or anything Google. They are the "Tracking Champion"! I found AdBlock on OSX 10.11 works fine. BUT blocking sites requires you to double click on the site to add it to "Blocked" list. I mostly use FireFox, but Safari is pretty good also. I have the 5/50gb plan, sometimes have run low last week of month. Never ran out yet. Speed varies so much. "Activity Montor" shows varying speeds, but 6mb takes only a few seconds. Currently showing less than 100 bytes/sec.! Larger sending speed goes way up.