<source src="../playlist.m3u" type='audio/x-mpegURL'>

so, i'm working on a completely local project. specifically, i'm working on an interactive bandcamp liner note download, and the actual target is mostly flac (although it should work for mp3, too). for this reason, i can't be downloading software, and i'm not interested in running scripts. the user needs to be able to launch a notes.html file locally and be able to run a local playlist of the local files s/he just bought in the document. i understand that it's as easy as directing to the proper m3u file via the html5 tag, iff you're using safari. but, i'm not using safari, and i'd guess most of my audience isn't, either. what happens in both firefox 54 (windows 7) and a 60x v of chrome on a chromebook is that the controls load, but i can't press play. this is an old laptop, and i can't run nightly builds on it. but, is there a specific version of firefox where this flips over and starts working? basically, what i want is for this to work or for some very close analog of it to work: <audio controls> &lt;source src="../playlist.m3u" type='audio/x-mpegURL'&gt; </audio> again: i know how to do this using javascript, but i'm assuming the end user is running the file locally. so, there's no server involved.