Firefox crashes after opening HUD

[mrpotato]

I installed the new WebApps feature and changed a lot of stuff that the installation required. While I was trying it, I noticed that Firefox crashed every time I opened the HUD. I uninstalled the WebApps thing following the instructions in their PPA https://launchpad.net/~webapps/+archive/preview

sudo apt-get install ppa-purge
sudo ppa-purge ppa:webapps/preview

But the problem is still there. I think Unity got updated to a test version but it didn't downgrade to the previous version after uninstalling the ppa (as some other programs did).

Obviously, what I expected to happen was the HUD to work and Firefox not to crash.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.10.0-0ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu11
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,resize,imgpng,compiztoolbox,grid,mousepoll,neg,vpswitch,wall,snap,gnomecompat,move,place,regex,obs,animation,session,expo,workarounds,ezoom,staticswitcher,fade,scale,unityshell,scaleaddon]
Date: Fri Jul 20 15:23:35 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Felix Möller (felix-derklecks)]

For me this happens even on an empty page. Just have to keep alt pressend and then type random letters into the hud.
It will bring up the upstream firefox crash reporter ...

[Launchpad Janitor (janitor)]

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