"*": {
   "blocked_install_message": "Not Allowed contact HelpDesk.",
   "install_sources": ["https://www.example.com/*"],
   "installation_mode": "blocked",
   "allowed_types": ["extension"]
 },
 "uBlock0@raymondhill.net": {
   "installation_mode": "force_installed",
   "install_url": "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi"
 },
   "https-everywhere@eff.org": {
   "installation_mode": "allowed"
 },
 "jetpack-extension@dashlane.com": {
   "installation_mode": "allowed",
   "install_url": "https://prod.extensions.dashlane.com/downloads/firefox/dashlane-latest-fx.xpi"
 }

Hello, I am trying to manage Firefox Extension using "Extension Setting" via Intune. Source: https://github.com/mozilla/policy-templates/blob/master/README.md#extensionsettings I am testing below JSON for testing. ''<enabled/> <data id="ExtensionSettings" value=' { "*": { "blocked_install_message": "Not Allowed contact HelpDesk.", "install_sources": ["https://www.example.com/*"], "installation_mode": "blocked", "allowed_types": ["extension"] }, "uBlock0@raymondhill.net": { "installation_mode": "force_installed", "install_url": "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi" }, "https-everywhere@eff.org": { "installation_mode": "allowed" }, "jetpack-extension@dashlane.com": { "installation_mode": "allowed", "install_url": "https://prod.extensions.dashlane.com/downloads/firefox/dashlane-latest-fx.xpi" } }'/>'' When deployed to test devices, all extension previously installed get removed and Ublock get installed, seem like working as intended but when I try to install any "Allowed" I get the block installed message. I see no error in "about:policies". I don't know where else to look for why its getting blocked? Any help will be much appreciated.