The latest Firefox v58 update on Mac OS X is not working with MySpeed .

There is an update for MySpeed to work with Firefox v58+

Download and install MySpeed 6.4 (6440).

For more information about the changes to Firefox and why this updated is needed, read more at the link below.

Click here for the full details of why this update is needed..

Applies to: MySpeed for Mac Version 6.4+ and Firefox v58+

Operating System: OS X