Firefox since version 43 needs to have all add-ons signed. Reminderfox loaded from the official Mozilla add-on page
is officially signed. So it should not be disabled with a restart of Firefox.
If you're faced with the situation Reminderfox is disabled, please go for the following steps:
-- If Reminderfox has been disabled go the the "Add-ons" tab of Firefox and enable Reminderfox.
-- Go to the Reminderfox Options. You find that with the context menu (right mouse click) on the Reminderfox icon on the menu bar.
-- On the "General" tab use the link "Back up reminders to file" -- select a directory where you can go to easily again later.
-- Remove Reminderfox with the "Add-ons" tab
-- Restart Firefox
-- Reinstall Reminderfox using the official page:
https://addons.mozilla.org/en-US/firefox/addon/reminderfox/-- If you are missing your reminders after the installation, open Reminderfox Options. On the "General" tab use the link "Restore from backup file"
Please report back any other experience.
Guenter