Widevine crashes on Firefox 49.0.2 and Ubuntu 16.10

[clel]

After upgrading to Ubuntu 16.10 the Widevine plugin of Firefox crashes when trying to watch a video, while Widevine works fine in Chrome.
Before upgrading it worked without problems with the same Firefox version. So I assume there is some conflict with Ubuntu.

This happens on all my three devices.

I logged into guest mode and tried it there, but same problem occurs.

One of some crash reports I sent with Firefox: https://crash-stats.mozilla.com/report/index/088a0c5c-5509-423b-8347-6ed842161022#tab-details

Bug Report on Bugzilla: https://bugzilla.mozilla.org/show_bug.cgi?id=1315934

My corresponding question on askubuntu: http://askubuntu.com/questions/840511/firefox-widevine-plugin-crashes-immediately-after-upgrade-to-ubuntu-16-10

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[clel (clel)]

Also created a report on Bugzilla, since I didn't get Feedback from a person responsible here.

[clel (clel)]

Sorry, forgot the link: https://bugzilla.mozilla.org/show_bug.cgi?id=1315934

[clel (clel)]

This has been fixed by Mozilla with Firefox 50.

[Lars Bischoff (lbischoff)]

I had the same issue with Firefox 49.0.2 but could workaround it by setting:

export MOZ_DISABLE_GMP_SANDBOX=1

Now with Firefox 50 this does not help anymore. :-(
Now Netflix always gives error code "M7363-1260" when trying to play a video.

(I'm faking User Agent to Chrome on Linux, which worked nicely with older 49 versions)

[clel (clel)]

I am not sure, whether you are experiencing the same problem, since mine has been fixed with Firefox 50.

[Lars Bischoff (lbischoff)]

So Netflix is working for you on Firefox 50?
Which User Agent are you using? (since the "real" one is still not excepted by Netflix :-( )

[Lars Bischoff (lbischoff)]

accepted! Not excepted.
Boy, its too late...

[clel (clel)]

I didn't test with Netflix, but I assume my problem was completely different and not related to a single site. So I guess your issue is simply because of Netflix not working good with Firefox currently (if at all).

[Lars Bischoff (lbischoff)]

Got Netflix working again with Firefox 50.
I had to adjust the User Agent (using "User-Agent Switcher" plug-in) to:
Linux / Chrome 53: Mozilla/5.0 (X11; Ubuntu; Linux x86_64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/53.0.2785.34 Safari/537.36

And I do not need the "export MOZ_DISABLE_GMP_SANDBOX=1" workaround anymore, which helped to avoid a crash with 49.0.2. when widevine was started (after Ubuntu 16.10 upgrade). I guess this issue was related to problem described here.

[Paul White (paulw2u)]

Upstream bug is a duplicate of #1303813 which
is showing "RESOLVED FIXED" on 2016-08=9-28
with a target of Firefox 52.

No reports here for over 2 years so closing.