Autoplay 2

Error while calling actor 'parentProcessTarget's method 'ensureCSSErrorReportingEnabled' Argument 1 of InspectorUtils.getAllStyleSheets is not an object. protocol.js:1021:5
ensureCSSErrorReportingEnabled@resource://devtools/shared/base-loader.js -> resource://devtools/server/actors/targets/browsing-context.js:1012:9
handler@resource://devtools/shared/base-loader.js -> resource://devtools/shared/protocol.js:1178:21
onPacket@resource://devtools/shared/base-loader.js -> resource://devtools/server/main.js:1721:15
send/<@resource://devtools/shared/base-loader.js -> resource://devtools/shared/transport/local-transport.js:64:11
exports.makeInfallible/<@resource://devtools/shared/base-loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:109:14
exports.makeInfallible/<@resource://devtools/shared/base-loader.js -> resource://devtools/shared/ThreadSafeDevToolsUtils.js:109:14
protocol.js:1024:7
Stylesheets without CSSOM changes reparsed to check for errors. Refresh the page to also see errors from stylesheets changed from CSSOM and from style attributes.
XHRGEThttp://detectportal.firefox.com/success.txt
[HTTP/1.1 200 OK 15ms]