So, I use rxvt as my daily interface to my computers. I also use mutt for my email reading pleasure. Sometimes, I get URLs in email and I want to read them in a browser. If I was using a GUI based mail reader, I would just click the URL to open it. Well, there is an easy way to set up rxvt to do that!

Using the fine Arch Linux wiki entry for rxvt unicode, the solution is quite easy. In the file ~/.Xdefaults, add:

URxvt.perl-ext-common:  default,matcher
URxvt.url-launcher:      /usr/bin/firefox
URxvt.matcher.button:   1

And either do a xrdb --merge ~/.Xdefaults or log out/log in. And start a new rxvt, and you are good to go.