User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0 Build ID: 20170520072017 Steps to reproduce: Open webpage www.mojevideo.sk Actual results: Page is viewe OK, but when trying to play any video, it is not played, only sound is heared Expected results: Play video
Thanks for firing this bug. Can you try to use the latest released version, 54, to see if you can see the same problem or not?
(In reply to Blake Wu [:bwu][:blakewu] from comment #1) > Thanks for firing this bug. > Can you try to use the latest released version, 54, to see if you can see > the same problem or not? Already tested on version 54... not working
It is reproduced by Nightly also. May I have the chance to take a look first?
This issue is not Fennec specific, If you turn to m.mojevideo.sk (mobile version website) on Desktop Firefox, it can also be reproduced.
The video is played normally by media side but the media element is rendered in somewhere where we can not visually see it in the viewport, so there is only sound can be heard. If you use the desktop browser to reproduce this issue, you will see below log in the console, "Request for fullscreen was denied because Element.requestFullscreen() was not called from inside a short running user-generated event handler." I just view the source from its html (http://m.mojevideo.sk/3qnp) "<video src="http://fs5.mojevideo.sk/dll/1e77cb624faf7e609d81854ea5b82ea2/59476595/174517.mp4" x-webkit-airplay="allow" id="html5video" requestFullScreen preload="metadata"></video>" they used some webkit-only attributes which I'm not sure if it is related to this symptom. Hi Blake, Would you please transfer this issue to the layout or DOM person for classifying the category of this issue? Thanks
Eric, Per comment 5, is it something you can help us to clarify if this is website bug or not?
Flags: needinfo?(bwu) → needinfo?(etsai)
Flags: needinfo?(etsai) → needinfo?(bwu)
I can see the log from Console: "Request for fullscreen was denied because Element.requestFullscreen() was not called from inside a short running user-generated event handler. 3qnp:233:16" Maybe this website uses requestFullscreen improperly. Hi Xidorn, What do you think?
Flags: needinfo?(bwu) → needinfo?(xidorn+moz)
From comment 9, this bug looks more related to "DOM: Events", so change the component.
Component: Audio/Video → DOM: Events
Product: Firefox for Android → Core
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