If its Webgl, like this: https://www.pornhentai.games/play/html/Together-Again-V0.1.3/ then it works in any browser. I can't get the Mac version to work when i download it.
Sorry for late reply.
Hey there. The official latest WebGL ver is here- https://www.newgrounds.com/portal/view/769660
This is the same version as the download version.