Firefox will not start by clicking a link in an e-mail.

Question

Clicking a link in an e-mail will not start up Firefox. Clicking the same link multiple times, causes multiple occurrences of Firefox to display as "running" in The Windows Task manager. I have to go into Task Manager and close all these then start Firefox from the Task Bar, and then click the link in the message to follow the link. Both Internet Explorer (11) and Chrome will open just by clicking the e-mail message link.
This is a new problem with Firefox as it worked as described above prior to update 29. I am now running update 30.

Answer 1

Press the '''<Alt>''' or '''<F10>''' key to bring up the tool bar.
Followed by;
Windows; '''Tools > Options'''
Linux; '''Edit > Preferences'''
Mac; ''application name'' '''> Preferences'''
Then '''Applications.'''
This list tells Firefox what to do with what type of file or action.
Look for '''Mail To''' and check its options.
Now, on the computer; '''Windows > Start.''' On the bottom is a search
box. Type '''Default.''' On the new list, click '''Default Programs.'''
Click '''Set Default Programs.''' Look for the program you want to
use, click it, and select '''Set This Program As Default.'''