Loading the following page into either IE or Firefox results in a page with speaker icons. Clicking on the speaker icons in IE results in the word being played through the PC speakers in IE, but results in nothing in Firefox. http://www.thai-language.com/id/4193 Related Discussion:- https://support.mozilla.org/questions/954838

Clicking a speaker icon runs some JS that creates an <object> with width and height 0px elsewhere on the page. The <object>'s data attribute is the relative URL of an mp3, and it has autoplay=true and autostart=1 <params>. I can't reproduce on Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:22.0) Gecko/20130329 Firefox/22.0.

<object> is plugins so I've changed the component to that. Audio/Video is used for HTML audio/video elements. If the problem is indeed <audio> and <video> usage, please change back.

So <object data="file.mp3"> will try and load the .mp3 with either a plugin or built-in handlers (which would be nearly equivalent to <iframe src="file.mp3">) Users with some plugin (WMP, maybe Quicktime / Gecko-Mediaplayer?) that handles mp3 would get sound, and users on a recently nightly with WMF enabled where we can play MP3 natively would get sound (or a linux build with --enable-gstreamer), but normal release users without a specific plugin would not (whereas IE would play MP3 natively, without a plugin). So I would say this is either INVALID or a dupe of bug 832754

(In reply to John Schoenick [:johns] from comment #3) > So I would say this is either INVALID or a dupe of bug 832754 Sorry that should be bug 799318

Is this a regression in a new version of Firefox, or has it always been like thi?

I can reproduce this with Firefox mobile 19.0 too

That doesn't really answer the question, though: did this work in any prior version of Firefox? As far as I can tell, this appears to be a website issue, not a Mozilla bug.

The bug here would be that Firefox doesn't support MP3, so let's just call it a dupe of 799318