Trying to understand DRM

Web: https://www.reddit.com/r/privacy/comments/s14ia5/trying_to_understand_drm/

So, how bad is it if I run a DRM website on browser say Firefox?? (not Google Chrome or M$ Edge)

ex. Spotify webapp

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According to EFF:

Instead DRM helps big business stifle innovation and competition by making it easy to quash "unauthorized" uses of media and technology.

But isn't it DRM less powerful on a website??

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thanks

drm privacy