Ok I decided to add my bugs to this topic.
So...
In this beta open links in new tab via right click doesn't work well if we compare it to previous Mx version.
There is "Save image" options instead "Open link in new tab".
It happens on a lot of websites.
Check screenshots for comparision/ more details, please.
Two example links :
http://www.deviantart.com/browse/all/customization/skins/windows/win10/
http://www.gry-online.pl/
IMHO this change is very inconvenient.