--- a/browser/components/enterprisepolicies/Policies.jsm
+++ b/browser/components/enterprisepolicies/Policies.jsm
@@ -1431,47 +1431,47 @@ function setDefaultPermission(policyName
       setDefaultPref(prefName, 0, policyParam.Locked);
     }
   }
 }
 
 /**
  * addAllowDenyPermissions
  *
- * Helper function to call the permissions manager (Services.perms.add)
+ * Helper function to call the permissions manager (Services.perms.addFromPrincipal)
  * for two arrays of URLs.
  *
  * @param {string} permissionName
  *        The name of the permission to change
  * @param {array} allowList
  *        The list of URLs to be set as ALLOW_ACTION for the chosen permission.
  * @param {array} blockList
  *        The list of URLs to be set as DENY_ACTION for the chosen permission.
  */
 function addAllowDenyPermissions(permissionName, allowList, blockList) {
   allowList = allowList || [];
   blockList = blockList || [];
 
   for (let origin of allowList) {
     try {
-      Services.perms.add(
-        Services.io.newURI(origin.href),
+      Services.perms.addFromPrincipal(
+        Services.scriptSecurityManager.createContentPrincipalFromOrigin(origin),
         permissionName,
         Ci.nsIPermissionManager.ALLOW_ACTION,
         Ci.nsIPermissionManager.EXPIRE_POLICY
       );
     } catch (ex) {
       log.error(`Added by default for ${permissionName} permission in the permission
       manager - ${origin.href}`);
     }
   }
 
   for (let origin of blockList) {
-    Services.perms.add(
-      Services.io.newURI(origin.href),
+    Services.perms.addFromPrincipal(
+      Services.scriptSecurityManager.createContentPrincipalFromOrigin(origin),
       permissionName,
       Ci.nsIPermissionManager.DENY_ACTION,
       Ci.nsIPermissionManager.EXPIRE_POLICY
     );
   }
 }
 
 /**