JSFiddle startup gives multiple warnings and errors in browser Console

[chrisjj]

https://jsfiddle.net/boilerplate/react-jsx gives:

This on Windows Chrome browser.

[oskarkrawczyk]

• Errors caused by content blockers in your browser.
• Warnings can be ignored, never found a way to keep all browsers happy in regards to specifying an iframe allowlist – I'll take any suggestions that might resolve the issue.

[chrisjj]

Thanks. And thanks for a great product.