How to set Apple Mail to open links in Firefox?
Maybe a system upgrade or two ago, links in Apple mail e-mails would default to Firefox for opening. Now Apple Mail defaults to Safari to open links in e-mails.
I can't find any setting in Apple Mail to set a default browser to open links, nor can I find anything in Firefox for this preference.
How can I set Apple Mail to open links in Firefox?
Mac mini, OS X El Capitan (10.11.6)