Assegnate 3 su 5 stelle

Is it open source?

Questa recensione riguarda una versione precedente (3.7) del componente aggiuntivo. 

Hello,
Sadly no, none of my addons are open source yet.
I'm working on my addons full-time and I'm trying to make it a working business which seems to be easier with closed source.
But if it helps, I'm official Friend of Addons :)
https://blog.mozilla.org/addons/2020/06/15/friend-of-add-ons-juraj-masiar/

Best regards,
Juraj Mäsiar