For the love of mozilla! How to disable addons installation popups?


I have an issue that always driving me crazy with Mozilla products.

Does anyone know which config editor settings in Thunderbird (and ideally for FF too) I need to change in order for addons to just install without 100s popups showing telling me “Add this”, “OK installed” etc. ?

I know there was a setting like this a decade ago where it would just install the add directly without you having to confirm and reconfirm