diff --git a/browser/base/content/pageinfo/permissions.js b/browser/base/content/pageinfo/permissions.js
index 5f51d3c7a52f..55a16b931d47 100644
--- a/browser/base/content/pageinfo/permissions.js
+++ b/browser/base/content/pageinfo/permissions.js
@@ -6,7 +6,6 @@
 
 const {SitePermissions} = ChromeUtils.import("resource:///modules/SitePermissions.jsm");
 
-var gPermURI;
 var gPermPrincipal;
 var gUsageRequest;
 
@@ -23,7 +22,7 @@ var permissionObserver = {
   observe(aSubject, aTopic, aData) {
     if (aTopic == "perm-changed") {
       var permission = aSubject.QueryInterface(Ci.nsIPermission);
-      if (permission.matchesURI(gPermURI, true) && gPermissions.includes(permission.type)) {
+      if (permission.matches(gPermPrincipal, true) && gPermissions.includes(permission.type)) {
           initRow(permission.type);
       }
     }
@@ -32,11 +31,10 @@ var permissionObserver = {
 
 function onLoadPermission(uri, principal) {
   var permTab = document.getElementById("permTab");
-  if (SitePermissions.isSupportedURI(uri)) {
-    gPermURI = uri;
+  if (SitePermissions.isSupportedPrincipal(principal)) {
     gPermPrincipal = principal;
     var hostText = document.getElementById("hostText");
-    hostText.value = gPermURI.displayPrePath;
+    hostText.value = uri.displayPrePath;
 
     for (var i of gPermissions) {
       initRow(i);
@@ -63,7 +61,7 @@ function initRow(aPartId) {
 
   var checkbox = document.getElementById(aPartId + "Def");
   var command  = document.getElementById("cmd_" + aPartId + "Toggle");
-  var {state, scope} = SitePermissions.get(gPermURI, aPartId);
+  var {state, scope} = SitePermissions.getForPrincipal(gPermPrincipal, aPartId);
   let defaultState = SitePermissions.getDefault(aPartId);
 
   // Since cookies preferences have many different possible configuration states
@@ -168,7 +166,7 @@ function onCheckboxClick(aPartId) {
   var command  = document.getElementById("cmd_" + aPartId + "Toggle");
   var checkbox = document.getElementById(aPartId + "Def");
   if (checkbox.checked) {
-    SitePermissions.remove(gPermURI, aPartId);
+    SitePermissions.removeFromPrincipal(gPermPrincipal, aPartId);
     command.setAttribute("disabled", "true");
   } else {
     onRadioClick(aPartId);
@@ -180,7 +178,7 @@ function onRadioClick(aPartId) {
   var radioGroup = document.getElementById(aPartId + "RadioGroup");
   var id = radioGroup.selectedItem ? radioGroup.selectedItem.id : "#1";
   var permission = parseInt(id.split("#")[1]);
-  SitePermissions.set(gPermURI, aPartId, permission);
+  SitePermissions.setForPrincipal(gPermPrincipal, aPartId, permission);
 }
 
 function setRadioState(aPartId, aValue) {