Test Your Web Browser more useful on displays supporting at least 1500 nits HDR. For Chromium (Chrome/Edge/Brave) go to chrome://flags -> Enable "Experimental Web Platform Features". Or copy HDR canvas: Chrome - supports WCG HDR via feature flag setting Brave - supports WCG HDR in upcoming TestUFO v3.1 Safari (non-WebGPU) - supports WCG only FireFox - supports WCG only on MacOS only (not Windows) ，。