摘要：
Yes, in fact that you can download the source package, and uninstall the firefox 3.6 in Ubuntu and then install the 4.0 version, but how about when you want to own 3.6 and 4.0 at the same time?Here is a way to do it.Add the source.sudoadd-apt-repositoryppa:ubuntu-mozilla-daily/ppaUpdate the sources. 阅读全文
