During the development of Blur Busters Motion Tests at www.testufo.com, extensive tests were made in all major web browsers, including on 120Hz computer monitors. — view large image of benchmarks.
This graph shows wide variances in motion fluidity within different web browsers that support VSYNC at 60Hz, 100Hz and 120Hz. During development, Mozilla added 120 Hz support to FireFox 24+ pre-beta.
There is a World Wide Web Consortium (W3C) recommendation (end of section 5) on synchronizing animation timings to refresh rate, and the newest versions of most browsers are now able to achieve this with perfect VSYNC motion fluidity with a GPU-accelerated browser (Chrome 18+, Opera 15+, FF 24+ Beta, Safari 6+, even on newer iPad/iPhone and Windows 8 tablets).
With websites such as TestUFO (now working in all 5 browsers), and Epic Citadel (now working in FireFox, Chrome and Opera), browser fluidity performance is very important, as is a browser’s ability to automatically support 120Hz computer monitors.