User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0 (Beta/Release) Build ID: 20130910160258 Steps to reproduce: Browse to any web page that has a WebM video embedded via the EMBED html tag. Actual results: The space where the WebM video should appear instead shows a gray box, stating that a plugin is required to play the content. Expected results: The WebM video should have appeared on the page where it was embedded and played.
Let me also add that there is also a problem when it is embedded via the IMG tag. According to what I understand about WebM, it is supposed to be able to be handled like an image, only a moving image, such that it is embeddable via the IMG tag. It did indeed work properly as such in a previous version of Firefox, but not the current one version (ver 24.0). I'm not sure in which version it stopped working. Now where the IMG embedded WebM video should appear, instead just a blank spot appears, as if an invalid image file was attempted to be embedded.
Reproduced with <embed type="video/webm" width="480" height="385" src="1.webm"></embed> in 2011-01-01-03-mozilla-central-firefox-4.0b9pre.en-US.linux-x86_64 2012-07-02-03-05-51-mozilla-central-firefox-16.0a1.en-US.linux-x86_64 2013-03-04-03-09-33-mozilla-central-firefox-22.0a1.en-US.linux-x86_64 2013-10-28-03-02-05-mozilla-central-firefox-27.0a1.en-US.linux-x86_64 For IMG, see bug 895131.
OS: Windows 7 → All
Summary: WebM videos don't play, and indicate that a plugin is needed to play. → WebM videos in <embed> don't play, and indicate that a plugin is needed to play.
Does https://html.spec.whatwg.org/multipage/ say that this should work? Does it work in other browsers?
The relevant part of the spec is https://html.spec.whatwg.org/multipage/embedded-content.html#the-embed-element-setup-steps This special-cases the "image/svg+xml" type, but otherwise requires that the type be handled by a "plugin". Nothing really prevents us building in a "plugin" that handles the WebM MIME type, though... and nothing requires it either.
Per policy at https://wiki.mozilla.org/Bug_Triage/Projects/Bug_Handling/Bug_Husbandry#Inactive_Bugs. If this bug is not an enhancement request or a bug not present in a supported release of Firefox, then it may be reopened.
Status: UNCONFIRMED → RESOLVED
Last Resolved: 4 hours ago
Resolution: --- → INACTIVE
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