Downloading video to the player in parts. How to get 206 Patical Content in Firefox?

Question

PHP

At the moment there is a problem with the Firefox browser.
Using the PHP VideoStream class for HTML5 video streaming, I output video in chunks. In Chrome, the player loads all the videos to the end without problems. Each time making a request, getting "206 Partial Content". Firefox does not do this, it loads the first chunk and exits.
I was looking for a solution to this problem, I just found it since 2015, firefox has been suffering from such a problem and it has not been fixed.
At the moment, I'm leaning towards uploading video via xhr and mediaSource, because I don't see a solution to the problem anymore. But there are problems with this at the moment.
Can anyone suggest something for this implementation?