我已经做了：
sudo add-apt-repository ppa:webapps/preview
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install unity-webapps-preview
并收到以下消息：
Reading package lists... Done Building dependency tree Reading
state information... Done Some packages could not be installed. This
may mean that you have requested an impossible situation or if you are
using the unstable distribution that some required packages have not
yet been created or been moved out of Incoming. The following
information may help to resolve the situation:
The following packages have unmet dependencies: unity-webapps-preview
: Depends: xul-ext-unity but it is not going to be installed
Depends: xul-ext-websites-integration but it is not going to be installed
Depends: xul-ext-webaccounts but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
怎么了？
答案1
我遇到了同样的问题，我尝试安装依赖包，但它给了我这个
The following packages have unmet dependencies:
xul-ext-websites-integration : Breaks: firefox (>= 15.+) but
16.0.2+build1-0ubuntu0.12.04.1 is to be installed
我读到过一些文章说删除 Firefox 然后安装 Chromium 可以解决问题，但我还没有尝试过，因为我喜欢 Firefox
我正在使用 Ubuntu 12.04 32 位