Set Custom Referer to protect stream

hello,

I need to protect hls streaming by page referer, the situation

```
http://www.example.com/mysteam.php < the stream
http://cdn.example.com/flashls.swf < served by CDN for optimization
```

currently the referer is `http://cdn.example.com/flashls.swf` but it should be `http://www.example.com/mysteam.php` or any url where the page is playing. is there any way to Set Custom Referer?

Browser: Firefox 47 windows

Thanks

The issue names no files, tests, or entry points. Start by identifying where flashls constructs HLS requests and verify whether the Flash runtime permits a caller-supplied Referer; done requires a confirmed supported approach for the page URL or a clear limitation.

Written by the indexing model from the issue text.