Good performance on browsers that support HLS: Safari (iOS, OS X), MS Edge, Chrome (Android)
Mediocre performance on browser that support MSE (polyfilled with hls.js)
No bullshit: no ads, no tracking, no plugins; only HTML5 and JS (needed for polyfilling HLS)
Some stations are geoblocked outside Germany, some streams don't have the necessary header for polyfill to work
I only provide shortcuts to the official livestreams, I do not stream any content myself
They have stupid content and makes you dumb. Also, they do not provide web streams because they think their content is valuable. If you find some streams, tell me.