I agree, ecommerce sites are the place that I most often want to open several items in tabs and decide between them, and the place this function is most often blocked! I wish I could scream at the jerk who implemented this, but that jerk is not among the options of screamable people.
It's entirely possible the browser itself does, but that the site's JavaScript is (also) overriding the right click handler. There's browser extensions to override their override but having to do that is stupid.