How to enable/disable dial's preview auto update in Firefox?

How to enable/disable dial's preview auto update?

Right-click on the desired dial and select ‘Edit’.

Then put a checkmark opposite ‘Auto Update’ and select the auto update interval.

You can also change auto update settings for all speed dials at once.

Just open FVD Speed Dial ‘settings' and press 'Auto Update’, then set the required update interval.