Firefox add-on manager just hangs & firebug doesn't work after update to v11

[Rob Rosko]

Ubuntu 10.10
11.0+build1-0ubuntu0.10.10.2 (firefox)
I expected to be able to use add-ons I had installed and used previously on Firefox v10 before the auto update to v11, and/or at the least have the ability to manage them.
What happened instead, after the auto update to v11 - I cannot get the Add-ons Manager to display any add-ons and subsequently I cannot uninstall/delete any outdated add-ons, nor can I install any add-ons.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: firefox 11.0+build1-0ubuntu0.10.10.2
ProcVersionSignature: Ubuntu 2.6.35-32.66-generic 2.6.35.14
Uname: Linux 2.6.35-32-generic i686
NonfreeKernelModules: nvidia
AddonCompatCheckDisabled: False
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: rob 1835 F.... pulseaudio
 /dev/snd/controlC1: rob 1835 F.... pulseaudio
BuildID: 20120310193444
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xddef8000 irq 23'
   Mixer name : 'Realtek ALC662 rev1'
   Components : 'HDA:10ec0662,1043837f,00100101'
   Controls : 21
   Simple ctrls : 13
Card1.Amixer.info:
 Card hw:1 'Headset'/'Logitech Logitech USB Headset at usb-0000:00:02.0-5, full speed'
   Mixer name : 'USB Mixer'
   Components : 'USB046d:0a0c'
   Controls : 6
   Simple ctrls : 2
Card2.Amixer.info:
 Card hw:2 'NVidia_1'/'HDA NVidia at 0xddf7c000 irq 18'
   Mixer name : 'Nvidia ID 16'
   Components : 'HDA:10de0016,10de0101,00100100'
   Controls : 0
   Simple ctrls : 0
Card2.Amixer.values:

Channel: release
Date: Wed Mar 21 07:33:41 2012
EtcFirefoxSyspref: Cannot parse /etc/firefox/syspref.js - [Errno 2] No such file or directory: '/etc/firefox/syspref.js'
ForcedLayersAccel: False
IfupdownConfig:
 auto lo
 iface lo inet loopback
IncompatibleExtensions:
 Bindwood - <email address hidden>, Version=1.0.4, minVersion=3.5, maxVersion=9.0.*, Location=app-system-share, Type=extension, Active=Yes
 Ubuntu Firefox Modifications - <email address hidden>, Version=0.9.4, minVersion=4.0b6, maxVersion=10.*, Location=app-system-share, Type=extension, Active=Yes
 LastPass - <email address hidden>, Version=1.90.4, minVersion=1.9a2, maxVersion=1.9.6, Location=app-profile, Type=extension, Active=Yes
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
IpRoute:
 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.106 metric 1
 169.254.0.0/16 dev eth0 scope link metric 1000
 default via 192.168.1.1 dev eth0 proto static
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
PciNetwork:

ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=11.0/20120310193444 (Running)
RfKill:

RunningIncompatibleAddons: True
SourcePackage: firefox
WifiSyslog:

dmi.bios.date: 09/22/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1002
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M2N68-AM SE2
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1002:bd09/22/2009:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2N68-AMSE2:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer