I've recently bought a new Dell Inspiron G5 laptop with the GTX 1050 Ti.
Today I wanted to play Dead Space 1, which is notorious for only having half-refresh Vsync built in while the game physics and controls break while running unlocked on modern GPU's in excess of 300 FPS.
So I've tried...
http://www.testufo.com/#test=framerates
Run this in Firefox it shows correctly 144hz, run it in IE and it shows only 72hz.
Ran it in Linux too and it said Linux does not support vsync, which explains why videos have tearing in Linux.