[Mozilla Enterprise] Policy engine, GPO, FF-60.4.0esr

[tagtraeumer]

Hello,
according to Mike's recommendation 
https://mike.kaply.com/cck2/
we are switching to GPO driven configuration, using this templates:
https://github.com/mozilla/policy-templates 
and 'Local Group Policy Non-Administrators'.

It is working so far, not known is following question about extensions/ addons:
If installing an addon by: 
{ "policies": {
    "Extensions": {
      "Install": ["https://addons.mozilla.org/firefox/downloads/somefile.xpi", "//path/to/xpi"],

is this addon updated by Firefox automatically or must it be updated 'by hand'?

Thanks for any hint, best regards, 
Chris