Closed Bug 1105905 Opened 5 years ago Closed 4 years ago offers a black screen with sound only when watching video in full screen


(Web Compatibility :: Mobile, defect, major)

Firefox 33
Gonk (Firefox OS)
Not set


(Not tracked)



(Reporter: chaochao.huang, Assigned: karlcow)




(Whiteboard: [video] [country-all])

1.Use SIM data.
2.Open browser-->>
3.Search video-->play video-->click on full screen.
4.Sound come but Screen black.
5.Not able to watch the video while click on full screen.
Summary: [FirefoxOS_v1.4][Browser] FFOS screen black & sound come when watch video in full screen in browser → [FirefoxOS_v1.4] [Browser] black screen, sound only when watching video in full screen
Hi karl:

  I think this this also a compatible with firefox problem, and android firefox web browser also have this problem, please help to investigate, thanks a lot.
Flags: needinfo?(kdubost)

Did you use any specific search terms?
Flags: needinfo?(kdubost) → needinfo?(
For firefox OS,
1. go to dailymotion.
2. Click on any video
3. Type the play button
4. Sometimes an ads is played, sometimes not.
5. The video is black, nothing is happening.

The video is part of an iframe.

<iframe src=";apiKey=ce08346aac01f35dc49e&amp;html=1&amp;id=f2e8b9a48b6b1d8&amp;info=0&amp;is_webapp=1&amp;logo=0" id="f2e8b9a48b6b1d8" title="Dailymotion video player" mozallowfullscreen="true" webkitallowfullscreen="true" allowfullscreen="true" class="video-player" frameborder="0" height="100%" width="100%"></iframe>

Sometimes I get the message:

   Media Not Supported
   The video could not be loaded, either because the 
   server or network failed or because the format is 
   not supported.

I also receive markup with "class="loader ios-loader" which makes me wonder if Firefox OS is detected as iOS.

<div style="display: none; margin-top: -22px;" class="loader ios-loader" id="loader">…

Checking their code: player-<unique_id>.js

  Modernizr.addTest('ua_mobile', function () {
    return t.match(/iPhone|iPod|CFNetwork|Android.*Mobile Safari|Windows Phone|IEMobile\/(?:9|1\d)|tizen|(Blackberry|BB10|BBOS; Touch).*Version\/10|Android; Mobile;.*Firefox|Mozilla\/\S+ \(Mobile;/i)

and more UA sniffing…

Still need to investigate a bit more.
(In reply to Karl Dubost :karlcow from comment #2)
> Did you use any specific search terms?

no, you can use any terms to search video in daily motions, and they all have same phenomenon.
Flags: needinfo?(
Dailymotion is being contacted.
Assignee: nobody → kdubost
Whiteboard: [video] [country-all]
Summary: [FirefoxOS_v1.4] [Browser] black screen, sound only when watching video in full screen → offers a black screen with sound only when watching video in full screen
I can't reproduce today on a Flame device. Watching video on DailyMotion opens the video(s) in full-screen, and both picure and sound is OK.
Hm..still an issue on Android
Works now :)
Closed: 4 years ago
Resolution: --- → WORKSFORME
Product: Tech Evangelism → Web Compatibility
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