I just verified this on my machine and it was able to uniquely identify across Brave browser, Firefox and Epic browser (based on Chromium). I didn't check Safar

I just verified this on my machine and it was able to uniquely identify across Brave browser, Firefox and Epic browser (based on Chromium). I didn't check Safari because that's the browser I use the most and don't want to test on that. The Epic browser one was interesting. That browser comes with a built in proxy for routing connections through other countries. I use it to get around geolocked content and sometimes for a tiny sense of anonymity. But seeing this able to identify it with same identifier as Brave and Firefox was a bit more troubling. But I guess that comes with the territory of all these browsers using the same Chromium engine.