1 files changed, 3 insertions, 1 deletions
diff --git a/browser/base/content/content.js b/browser/base/content/content.js
index 46e9b45d6..496e0d111 100644
--- a/browser/base/content/content.js
+++ b/browser/base/content/content.js
@@ -896,6 +896,7 @@ var LightWeightThemeWebInstallListener = {
       case "InstallBrowserTheme": {
         sendAsyncMessage("LightWeightThemeWebInstaller:Install", {
           baseURI: event.target.baseURI,
+          principal: event.target.nodePrincipal,
           themeData: event.target.getAttribute("data-browsertheme"),
         });
         break;
@@ -903,6 +904,7 @@ var LightWeightThemeWebInstallListener = {
       case "PreviewBrowserTheme": {
         sendAsyncMessage("LightWeightThemeWebInstaller:Preview", {
           baseURI: event.target.baseURI,
+          principal: event.target.nodePrincipal,
           themeData: event.target.getAttribute("data-browsertheme"),
         });
         this._previewWindow = event.target.ownerGlobal;
@@ -917,7 +919,7 @@ var LightWeightThemeWebInstallListener = {
       case "ResetBrowserThemePreview": {
         if (this._previewWindow) {
           sendAsyncMessage("LightWeightThemeWebInstaller:ResetPreview",
-                           {baseURI: event.target.baseURI});
+                           {principal: event.target.nodePrincipal});
           this._resetPreviewWindow();
         }
         break;