middlemouse.contentLoadURL's value is not saved

[Mathieu MD]

middlemouse.contentLoadURL's value is no more saved between sessions.

1) Go to about:config
2) Filter on middlemouse.contentLoadURL → Its value is "false" by default
3) Double-click on the line to set its value to "true"
4) Select this text: https://bugs.launchpad.net
5) Middle-click anywhere on the page → The Launchpad Bugs is loaded
6) Close all Firefox windows
7) Launch Firefox again
9) Select this text: https://bugs.launchpad.net
10) Middle-click anywhere on the page → Nothing happens
11) Go to about:config
12) Filter on middlemouse.contentLoadURL → Its value is "false" instead of "true"

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: firefox 5.0+build1+nobinonly-0ubuntu0.11.04.2
ProcVersionSignature: Ubuntu 2.6.38-10.44-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic i686
NonfreeKernelModules: wl
Architecture: i386
Date: Thu Jun 30 17:53:13 2011
EcryptfsInUse: Yes
FirefoxPackages:
 firefox 5.0+build1+nobinonly-0ubuntu0.11.04.2
 flashplugin-installer 10.3.181.26ubuntu0.11.04.1
 adobe-flashplugin N/A
 icedtea-plugin 1.1~20110420-0ubuntu1.1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 LANGUAGE=fr_FR:en
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)