cannot play html5 video in ubuntu 16.04
hi, i have upgraded to ubuntu 16.04 yesterday. i cannot play video or ads in youtube.com or video in http://www.quirksmode.org/html5/tests/video.html
it shows good in http://www.adobe.com/software/flash/about/ and the version information is 24.0.0.186
here is the information about firefox
about:plugins
OpenH264 Video Codec provided by Cisco Systems, Inc.
File: 1.6 Path: /home/xubuntu/.mozilla/firefox/bwrs3p8b.default/gmp-gmpopenh264/1.6 Version: 1.6 State: Enabled
Shockwave Flash
File: libflashplayer.so Path: /usr/lib/adobe-flashplugin/libflashplayer.so Version: State: Enabled Shockwave Flash 24.0 r0
Firefox version : 50.1.0
Distributor ID: Ubuntu Description: Ubuntu 16.04.1 LTS Release: 16.04 Codename: xenial
Linux xubuntu-vir 4.4.0-53-generic #74-Ubuntu SMP Fri Dec 2 15:59:10 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
youtube.com/html5 : all box with check mark -- HTMLVideoElement -- H.264 -- WebM VP8 -- Media Source Extensions -- MSE & H.264 -- MSE & WebM VP9 -- the HTML5 player is currently used when possible
thank you!