Как да подтиснем досадния Add-ons прозорец след инсталиране на extension

Едно от най-омразните ми неща във Firefox е това, че след инсталиране на extension той решава да ми съобщи, че съм инсталирал extension. :)
Смисълът на това събитие леко ми убягва и изпитвам непреодолима нужда да престана да получавам такъв тип информация...

Доста пъти рових из 'нета да намеря решение и най-после го открих:

You can stop this behaviour by adding the boolean value "extensions.newAddons" to your prefs.js and setting it to false. (I share my profile between Vista and XP, and I was sick of the Glasser add-on telling me it was installed whenever I switch to using Vista.) Hope this helps.

Prevent add-on manager popup after restart
http://forums.mozillazine.org/viewtopic.php?f=38&t=744765&start=0&st=0&sk=t&sd=a

Където има препратка и към:

I think you can disable this by adding the boolean value "extensions.newAddons"
under about:config and setting it false. It works for me.

Bug 447570 - Improve the usability of the add-on install notification
https://bugzilla.mozilla.org/show_bug.cgi?id=447570

Въпреки че:

Just a warning. While this does work, it does so by throwing the extension
manager into a minor failure state. Thankfully it does it late enough in the
startup process that it won't actually break anything, but that isn't
guaranteed not to change. It is sheer chance that two other places the
preference is used it is handled in such a way as to not cause a more serious
failure.