Firefox checks for new versions of your installed add-ons once per day, and at other designated times, such as when upgrading to a new version of Firefox. By default, Firefox will check the Mozilla Add-ons Gallery for updates, but individual add-on developers may set their add-ons to check their own websites for updates if they are not hosted with Mozilla.
It is strongly recommended that you do not turn off add-on update checking, as you may miss critical security updates to your installed add-ons. If you only wish to prevent add-on updates from being automatically installed, you may turn that functionality off from within the Add-ons Manager.
To turn add-on updates off entirely, follow these instructions:
- In Firefox’s location bar, type
- A warning may be displayed if this is your first time modifying Firefox config. If you wish to continue, click the button.
- In the Filter text box, type
- Double click the
extensions.update.enableditem to turn it from
Firefox will no longer check your add-ons for updates.