Install add-on from registry!

Hi everyone,
i’m trying to create a reg file, when i click on it i want my add-on to be installed from the registry when the browser start.
Under chrome it WORKS, the add-on is added when i start chrome, and + the add-on is locked, impossible for a regular user to disable it that’s what i like the most !
Here i’m talking about ALL the problems i have to achieving this!

https://discourse.mozilla.org/t/add-on-policy/35083/26

SO i’m looking for help, because i spent one week doing tests, and nothing works !!!

Thanks