Your job is to open a browser window of the default browser to http://codegolf.stackexchange.com.
Your code must open the browser itself, and cannot rely on an open one.
This is code-golf, so the shortest answer in bytes wins.
Moderator note: A large number of answers to this challenge use the URLs http://ppcg.lol or http://ppcg.ga. These URLs did direct to https://codegolf.stackexchange.com at the time, but have since expired. By this meta discussion, they have been allowed to stay, with the note that they are currently invalid.