Source Manifest.json {"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "version": "0.0.1", "name": "__MSG_extName__", "short_name": "__MSG_extShortName__", "description": "__MSG_extDescription__", "default_locale": "en", "icons": { "16": "icons/icon16.png", "48": "icons/icon48.png", "128": "icons/icon128.png", "256": "icons/icon256.png", "512": "icons/icon512.png" }, "content_scripts": [ { "matches": ["https://www.youtube.com/watch*"], "js": ["content.js"], "css": ["style.css"] } ], "background": { "service_worker": "background.js", "type": "module" }, "permissions": ["webNavigation", "scripting"], "host_permissions": ["*://www.youtube.com/*"]} Read more