What version of FF? On FF 44 this code works with the following warning in the console: The character encoding of the HTML document was not declared. The docum

What version of FF? On FF 44 this code works with the following warning in the console: The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol.