Opening something from e-mail link

When I click a link to something on the Internet in Windows Live Mail, it opens in Opera. I want to change this to Firefox. How do I do this? Thanks.

 

Another approach to changing your default browser: http://windows.microsoft.com/en-US/windows7/Change-which-programs-Windows-uses-by-default

 

Thank you, both plodr and usafveteran! I can see that either one of the suggested procedures works, and now I have Firefox as the default for opening email links to the Internet. MajorGeeks Rules.