[Chimera-users] How to fork/specify a web browser

For certain of the tutorials, help files, etc., Chimera linux displays a comment to use a web browser in order to use a URL file://foobar . How does one configure Chimera to automatically use a specified browser to diplay the URL generated by Chimera? I have not been able to find a preferences setting for this, nor an answer on the web or in the Chimera manuals/help. I have not perused the source code for Chimera to find a solution. Yasha Karant