Thunderbird Configured to Open Links in Firefox

A problem with Thunderbird was its apparent inability to open links in Firefox. This problem has been solved!
Solution: When in Thunderbird, do the following:
Edit->
preferences->
Select the "Advance" tab->
Select the Config Editor at the bottom of the window.

When in the "Config Editor" :
Right Click->
New->
String->
Name: network.protocol-handler.app.ftp ; Value: /path/to/firefox

Again:

Right Click->
New->
String->
Name: network.protocol-handler.app.http ; Value: /path/to/firefox

And once more:

Right Click->
New->
String->
Name: network.protocol-handler.app.https ; Value: /path/to/firefox

Of course, set the /path/to/firefox as the location of Firefox (in most cases /usr/bin/firefox). This should configure Thunderbird to open all links in a Firefox window (or Tab if Firefox is already running).