Bug 1632854 - Pass the ChromeWindow reference to the OSKeyStore instead of the content global so the dialog will be app modal. r=MattN

Differential Revision: https://phabricator.services.mozilla.com/D73109

browser/components/preferences/privacy.js

@@ -1948,10 +1948,11 @@ var gPrivacyPane = {
           id: "master-password-os-auth-dialog-caption",
         },
       ]);
+      let win = Services.wm.getMostRecentBrowserWindow();
       let loggedIn = await OSKeyStore.ensureLoggedIn(
         messageText.value,
         captionText.value,
-        window,
+        win,
         false
       );
       if (!loggedIn.authenticated) {