gstreamer-vaapi + nvidia driver causes firefox to crash on animated gifs / video tags

when loading pages with animated gifs, or seeking in the native embedded <video> tag handler wtih gstreamer-vaapi packages installed, firefox crashes (attempting to get crash report attached to same probelm as bug 1395070)

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: firefox 33.0+build2-0ubuntu0.14.10.1
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
NonfreeKernelModules: nvidia wl
AddonCompatCheckDisabled: False
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
BuildID: 20141013200324
Channel: Unavailable
CurrentDesktop: GNOME
Date: Tue Dec 2 15:28:06 2014
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2014-02-24 (281 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64 (20140218)
IpRoute:
 default via 10.9.0.1 dev wlan0 proto static
 10.9.0.0/23 dev wlan0 proto kernel scope link src 10.9.0.55 metric 9
Locales: extensions.sqlite corrupt or missing
MostRecentCrashID: bp-30dc1341-17c5-4c10-8d31-d00c82141202
PrefSources:
 prefs.js
 /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/<email address hidden>/defaults/preferences/001ubuntu-gnome-mods.js
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=33.0/20141013200324 (In use)
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: Upgraded to utopic on 2014-08-17 (107 days ago)
dmi.bios.date: 10/18/2013
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP112.88Z.0138.B02.1310181745
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-2BD1B31983FE1663
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro11,3
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-2BD1B31983FE1663
dmi.modalias: dmi:bvnAppleInc.:bvrMBP112.88Z.0138.B02.1310181745:bd10/18/2013:svnAppleInc.:pnMacBookPro11,3:pvr1.0:rvnAppleInc.:rnMac-2BD1B31983FE1663:rvrMacBookPro11,3:cvnAppleInc.:ct10:cvrMac-2BD1B31983FE1663:
dmi.product.name: MacBookPro11,3
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.