Widevine Plugin Firefox Jun 2026

By default, Firefox should automatically download and enable the Widevine CDM when you first visit a site that requires it. If it is disabled or missing, follow these steps to turn it back on: Support Mozilla

{ "manifest_version": 3, "name": "DRM Monitor", "version": "1.0", "permissions": ["activeTab", "scripting"], "content_scripts": [ { "matches": ["<all_urls>"], "js": ["content.js"] } ] } widevine plugin firefox

const license = await response.arrayBuffer(); By default, Firefox should automatically download and enable

// Generate the license request await session.generateRequest(initDataType, initData); } } Request access to the Widevine Key System //

If you're concerned about privacy, consider using a browser extension that blocks Widevine or restricts its data collection.

try { // 3. Request access to the Widevine Key System // This triggers Firefox to load the Widevine CDM plugin if not already active const keySystemAccess = await navigator.requestMediaKeySystemAccess(this.keySystem, config);