Web browsers have a much higher standard of quality here. It's ok if a local app like Blender uses an OpenGL driver that has security exploits - it's a local ap

Web browsers have a much higher standard of quality here. It's ok if a local app like Blender uses an OpenGL driver that has security exploits - it's a local app and almost always running trusted content. It's also not so bad if Blender crashes rarely due to a buggy GL driver or has rendering glitches because of it. In a web browser though, you need to be sure of security - you are running arbitrary content from the web - as well as stability and consistency. So WebGL-powered browsers blacklist drivers known to be problematic. You can override the blacklists if you dare, but it is very dangerous.