1238077 - Youtube should notify firefox if they are suddenly not going to support Full screen for some(read million) users

Status: RESOLVED INCOMPLETE

(Web Compatibility :: Site Reports, defect)

Description

[Anurag Goyal]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:43.0) Gecko/20100101 Firefox/43.0
Build ID: 20160105164030

Steps to reproduce:

Follow up from bug 1233970.
43.0.3 Firefox right before Holiday break stops getting served webm video on Windows XP, leaving million plus users out of full screen options. such things can be be bad for Firefox as people will try to move away from Firefox just because they are not getting right options from browser. This was big deal enough for mozilla (I presume) and hence 1233970 was fixed. (Spoofing userageant only possible workaround)

(This caused more issues for "other" not so user visible issues - I am yet to get access to those).

But i am raising this bug to have clarity that there should be co-ordination from google/YT if they are going to do some changes which will affect users (Million+ counts on that platform).

Further even now I am not getting served webm video on OSX 10.9/10.6.8 even if i had chosen to get VP9/html with option media.mediasource.webm.enabled something that google/YT had to fix from there end early Jan [See comment 11 here- https://bugzilla.mozilla.org/show_bug.cgi?id=1233970#c11]

No way associated with Mozilla, but still this is something that should be worked up between Google and Mozilla. (also I raised the original issue 1233970, which i have been track off late)


Actual results:

no Full screen options.


Expected results:

Webm Full screen Video

Comment 1

[Chris Peterson [:cpeterson]]

Thanks for reporting this issue, Anurag.

(In reply to Anurag Goyal from comment #0)
> User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:43.0)
> Gecko/20100101 Firefox/43.0
> Build ID: 20160105164030
> 
> Steps to reproduce:
> 
> Follow up from bug 1233970.
> 43.0.3 Firefox right before Holiday break stops getting served webm video on
> Windows XP, leaving million plus users out of full screen options.

Can you please clarify what you mean by "no full screen options"? Do you mean that full screen video looks choppy? Or that the YouTube player no longer shows a full screen button? Either of these issues would be surprising!


> Further even now I am not getting served webm video on OSX 10.9/10.6.8 even
> if i had chosen to get VP9/html with option media.mediasource.webm.enabled
> something that google/YT had to fix from there end early Jan [See comment 11
> here- https://bugzilla.mozilla.org/show_bug.cgi?id=1233970#c11]

YouTube should be serving VP9 to Firefox 43 or later, if you set media.mediasource.webm.enabled = true. YouTube told us they fixed the server problem yesterday and I receive VP9 on my OS X 10.11 test machine (with media.mediasource.webm.enabled = true).

Comment 2

[Anurag Goyal]

(In reply to Chris Peterson [:cpeterson] from comment #1)
#2. 43.0.4 with media.mediasource.webm.enabled on 10.6.8 continues to be serving mp4/avc1 till useragent is spoofed to 42 or 44. [Let me know this should be reported separately. This is something was an issue in bug 1233970 also (see comment 38 there). Now again not sure if YT is changing logic from backend on this(?).
yt.com/html5 gives me all 6 options ticked.

#1. Apologies, Its only 360P being made available to users not full screen mode issue. (This was not seen directly by me TBH, but bad enough to file for possible solution i mentioned in description.)

Comment 3

[Chris Peterson [:cpeterson]]

(In reply to Anurag Goyal from comment #2)
> (In reply to Chris Peterson [:cpeterson] from comment #1)
> #2. 43.0.4 with media.mediasource.webm.enabled on 10.6.8 continues to be
> serving mp4/avc1 till useragent is spoofed to 42 or 44. [Let me know this
> should be reported separately. This is something was an issue in bug 1233970
> also (see comment 38 there). Now again not sure if YT is changing logic from
> backend on this(?).

This should be fixed on YouTube's side by now. Do you still see the problem?

On OS X 10.11.2, I receive webm/vp9 if I change "media.youtube-ua.override.to" from 42 to 43 or 44. I receive MP4 when "media.youtube-ua.override.to" is 42, the default value. Note that "media.youtube-ua.override" must be true for the "media.youtube-ua.override.to" pref to be meaningful.

Comment 4

[Anurag Goyal]

Attachment: Screen shot 2016-01-16 at 8.24.24 AM.png

(In reply to Chris Peterson [:cpeterson] from comment #3)

> On OS X 10.11.2, I receive webm/vp9 if I change
> "media.youtube-ua.override.to" from 42 to 43 or 44. I receive MP4 when
> "media.youtube-ua.override.to" is 42, the default value. Note that
> "media.youtube-ua.override" must be true for the
> "media.youtube-ua.override.to" pref to be meaningful.

Not on 10.6.8, still shows mp4/avc1
see 2 screenshot I am adding.

Comment 5

[Anurag Goyal]

Attachment: Screen shot 2016-01-16 at 8.25.23 AM.png

also the webm flags

Comment 6

[Chris Peterson [:cpeterson]]

Anurag, so you are now receiving mp4/avc1 from YouTube on 10.6.8? MP4 is Firefox's preferred video format on machines that have H.264 hardware decoder (like all Macs). webm/VP9 will use more CPU. Thus, it sounds like this bug has been fixed on YouTube's side. Do you still see a problem?

Comment 7

[Anurag Goyal]

(In reply to Chris Peterson [:cpeterson] from comment #6)
> Anurag, so you are now receiving mp4/avc1 from YouTube on 10.6.8? MP4 is
> Firefox's preferred video format on machines that have H.264 hardware
> decoder (like all Macs). webm/VP9 will use more CPU. Thus, it sounds like
> this bug has been fixed on YouTube's side. Do you still see a problem?

Ok, a next run instance of firefox after, seems to have done the trick(don't know why, flag are applied rightaaway i would think)). I am being getting VP9 with media.mediasource.webm.enabled set to true with UA set to 44. but not with UA set to 43. 
1. so youtube seem to be still forcing mp4 on ff 42/43 with media.mediasource.webm.enabled works with FF UA set to 44.  2nd Half of the problem(in description) is kinda closed as of now.

Comment 8

[Hallvord R. M. Steen [:hallvors]]

So, can we close this bug now?

Comment 9

[Chris Peterson [:cpeterson]]

Thanks, Hallvord.

YouTube has fixed the version checks on the server side and we've since shipped Firefox 44 to our release channel, so this bug is no longer actionable.