[This is a copy of the question asked [[https://support.mozilla.org/en-US/questions/1438606|here]]; you cannot ask questions that target Firefox Desktop on mobile.] Hello all, Recently, I was browsing a website when Firefox (Windows 10, version 122) suddenly showed me an info bar asking me to turn on DRM content. While the message seems clear, I still wish to ask if it may be possible that websites force Firefox to download DRM modules and load them against my choice (and if possible to explain, how Firefox knows that DRM content is present on the page to begin with). A copy of the pop-up I found online: [https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2024-02-02-09-50-30-42f37d.png Image] Thank you all in advance!