firefox widevine

Sandbox: seccomp sandbox violation: pid 26554, syscall 28, args 140668695470080 8192 8 140668737421593 16384 2.  Killing process.
Sandbox: crash reporter is disabled (or failed); trying stack trace:
Sandbox: frame #01: madvise[/usr/lib/libc.so.6 +0xe4247]
Sandbox: frame #02: ???[/usr/lib/firefox/plugin-container +0x152b4]
Sandbox: frame #03: ???[/usr/lib/firefox/plugin-container +0x16ed5]
Sandbox: frame #04: ???[/usr/lib/firefox/plugin-container +0x17120]
Sandbox: frame #05: ???[/home/viesturs/.mozilla/firefox/3rfstq7n.widevine/gmp-widevinecdm/1.4.8.903/libwidevinecdm.so +0x16ef38]
Sandbox: frame #06: ???[/home/viesturs/.mozilla/firefox/3rfstq7n.widevine/gmp-widevinecdm/1.4.8.903/libwidevinecdm.so +0x16ec05]
Sandbox: frame #07: ???[/home/viesturs/.mozilla/firefox/3rfstq7n.widevine/gmp-widevinecdm/1.4.8.903/libwidevinecdm.so +0x16f868]
Sandbox: frame #08: ???[/home/viesturs/.mozilla/firefox/3rfstq7n.widevine/gmp-widevinecdm/1.4.8.903/libwidevinecdm.so +0x17024d]
Sandbox: frame #09: ???[/home/viesturs/.mozilla/firefox/3rfstq7n.widevine/gmp-widevinecdm/1.4.8.903/libwidevinecdm.so +0x2568b0]
Sandbox: frame #10: ???[/home/viesturs/.mozilla/firefox/3rfstq7n.widevine/gmp-widevinecdm/1.4.8.903/libwidevinecdm.so +0x25df76]
Sandbox: frame #11: ???[/home/viesturs/.mozilla/firefox/3rfstq7n.widevine/gmp-widevinecdm/1.4.8.903/libwidevinecdm.so +0x15b797]
Sandbox: frame #12: ???[/home/viesturs/.mozilla/firefox/3rfstq7n.widevine/gmp-widevinecdm/1.4.8.903/libwidevinecdm.so +0x524bc]
Sandbox: frame #13: ???[/usr/lib/firefox/libxul.so +0x1a75deb]
Sandbox: frame #14: ???[/usr/lib/firefox/libxul.so +0x1a65e79]
Sandbox: frame #15: ???[/usr/lib/firefox/libxul.so +0xd1d9b6]
Sandbox: frame #16: ???[/usr/lib/firefox/libxul.so +0xd12834]
Sandbox: frame #17: ???[/usr/lib/firefox/libxul.so +0xccea59]
Sandbox: frame #18: ???[/usr/lib/firefox/libxul.so +0xcd6bf1]
Sandbox: frame #19: ???[/usr/lib/firefox/libxul.so +0xcd7e66]
Sandbox: frame #20: ???[/usr/lib/firefox/libxul.so +0xccb260]
Sandbox: frame #21: ???[/usr/lib/firefox/libxul.so +0xccaab7]
Sandbox: frame #22: ???[/usr/lib/firefox/libxul.so +0xcbcbe1]
Sandbox: frame #23: ???[/usr/lib/firefox/libxul.so +0xcbd519]
Sandbox: frame #24: ???[/usr/lib/firefox/libxul.so +0xcbf84b]
Sandbox: frame #25: ???[/usr/lib/firefox/libxul.so +0xcba3d8]
Sandbox: frame #26: ???[/usr/lib/firefox/libxul.so +0xcba31a]
Sandbox: frame #27: XRE_InitChildProcess[/usr/lib/firefox/libxul.so +0x2407b2f]
Sandbox: frame #28: ???[/usr/lib/firefox/plugin-container +0x908c]
Sandbox: frame #29: __libc_start_main[/usr/lib/libc.so.6 +0x20291]
Sandbox: frame #30: _start[/usr/lib/firefox/plugin-container +0x8b3a]
Sandbox: frame #31: ??? (???:???)
Sandbox: end of stack.

###!!! [Parent][MessageChannel] Error: (msgtype=0x700010,name=PGMP::Msg_CloseActive) Channel error: cannot send/recv