building firefox 【linux】

  
sudo apt-get build-dep firefox
若出现下面的错误：
不能满足软件包 firefox 所要求的构建依赖关系
请将 /etc/apt/sources.list 改为默认的源 有就是 装完系统后自带的：
#deb cdrom:[Ubuntu 9.04 _Jaunty Jackalope_ - Release i386 (20090421.3)]/ jaunty main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://cn.archive.ubuntu.com/ubuntu/ jaunty main restricted
deb-src http://cn.archive.ubuntu.com/ubuntu/ jaunty main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://cn.archive.ubuntu.com/ubuntu/ jaunty-updates main restricted
deb-src http://cn.archive.ubuntu.com/ubuntu/ jaunty-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://cn.archive.ubuntu.com/ubuntu/ jaunty universe
deb-src http://cn.archive.ubuntu.com/ubuntu/ jaunty universe
deb http://cn.archive.ubuntu.com/ubuntu/ jaunty-updates universe
deb-src http://cn.archive.ubuntu.com/ubuntu/ jaunty-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://cn.archive.ubuntu.com/ubuntu/ jaunty multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ jaunty multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ jaunty-updates multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ jaunty-updates multiverse
## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the m