debian 7自带的iceweasel为17.很多插件不兼容。安装firefox，需要先删除iceweasel，而iceweasel依赖gnome-core。因为要用debian stable，所以用了chrome。和手机上的chrome同步也方便。apt中的chrome，很老，bug多。下载deb包安装
$ wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
$ sudo apt-get install libgconf2-4 libnss3-1d libxss1
$ sudo dpkg -i google-chrome-stable_current_amd64.deb
$ sudo apt-get -f install
$ sudo apt-get remove iceweasel
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
gnome-core iceweasel task-gnome-desktop
0 upgraded, 0 newly installed, 3 to remove and 0 not upgraded.
After this operation, 10.6 MB disk space will be freed.