"policies": {

     		"Allow": ["https://addons.mozilla.org/en-US/firefox/addon/exif-viewer/?src=search",
                               "https://addons.mozilla.org/en-US/firefox/addon/video-downloadhelper/?src=search"],			  

      }
  }

 "policies": {
   "InstallAddonsPermission": {
     "Allow": ["http://example.org/",
                     "http://example.edu/"],
     "Default": false
   }
 }

Hello, I am trying to control a whitelist add-on installation in firefox Quantum 61.0.2 (64-bit). I am using the policies.json file (located under C:\Program Files\Mozilla Firefox\distribution). Problem is if I use the following syntax, Firefox allow me to install any add-on other than the two listed. { "policies": { "InstallAddonsPermission": { "Allow": ["https://addons.mozilla.org/en-US/firefox/addon/exif-viewer/?src=search", "https://addons.mozilla.org/en-US/firefox/addon/video-downloadhelper/?src=search"], "Default": false } } } But, if I use the following code, all add-on are blocked. Anyone can tell me what is the correct syntax to control specific add-on to be installed on the computer? { "policies": { "InstallAddonsPermission": { "Allow": ["http://example.org/", "http://example.edu/"], "Default": false } } } Thank you.