Created attachment 8694777 [details] device-2015-12-02-181256.png Device: ZTE Grand X In (Android 4.0.4)(x86 device) Firefox 42.0.2 1. Open Youtube.com 2. Play a video Actual result: Video is not played When "stagefright.force-enabled" is set to "true", issue does not reproduce This issue is reproducing on Firefox 41 and Firefox 42; on Firefox 40 youtube app is opened Was able to reproduce this issue only on this particular device. This issue is NOT reproducing on Firefox 43 Beta 8 Related to latest UA changes?
Hm. Is there something special about how we handle h264 on this device? > When "stagefright.force-enabled" is set to "true", issue does not reproduce Snorp, can you shed some light on why/when stagefright isn't used? It's possible Google is trying to feature detect something that is failing here.
Flags: needinfo?(miket) → needinfo?(snorp)
Mihai, do you have any errors in the devtools console (or ADB) when you try to play the video? > This issue is NOT reproducing on Firefox 43 Beta 8 The patch from 1217055 was just uplifted to Beta 43 (yesterday). That actually removes the UA workarounds we had in place...
On a pre-4.1 device (such as this), we use a very error-prone video decoding backend that uses private libraries. If stagefright.force-enabled changes things, it means this device was blacklisted or something, and we wouldn't be able to decode H264 otherwise.
Nothing on android logs or web console logs android logs:https://pastebin.mozilla.org/8853729 console logs:https://pastebin.mozilla.org/8853728
Thanks Mihai... sorry for letting this slip (blame Mozlando (or actually just blame me)). If this indeed works in 43 (which ships tomorrow?), I suggest we close this as WONTFIX.
This is now reproducing on Firefox 43 RC, works fine on Aurora. That's strange.
Hm, not sure what to do here without a device I can repro on. :/
You need to log in before you can comment on or make changes to this bug.