I'm using Firefox on all of my mobile devices but I can't blame devs for ignoring FF for Android on this one. This is an API every other browser had working 10

I'm using Firefox on all of my mobile devices but I can't blame devs for ignoring FF for Android on this one. This is an API every other browser had working 10 years ago, it's on the Firefox team to sort out this mess. The less than a percent of users who don't see the error messages for controls marked in red isn't worth ignoring the standard for. The more websites use this, the more pressure Mozilla will feel to fix their browser. This isn't something like WebMIDI or whatever API Chrome or Safari implemented before standardising, it's part of the original HTML5 spec.