--- a/toolkit/components/extensions/ext-identity.js
+++ b/toolkit/components/extensions/ext-identity.js
@@ -49,17 +49,17 @@ const openOAuthWindow = (details, redire
   let supportsStringPrefURL = Cc["@mozilla.org/supports-string;1"]
                                 .createInstance(Ci.nsISupportsString);
   supportsStringPrefURL.data = details.url;
   args.appendElement(supportsStringPrefURL);
 
   let window = Services.ww.openWindow(null,
                                       Services.prefs.getCharPref("browser.chromeURL"),
                                       "launchWebAuthFlow_dialog",
-                                      "chrome,location=yes,centerscreen,dialog=no,resizable=yes",
+                                      "chrome,location=yes,centerscreen,dialog=no,resizable=yes,scrollbars=yes",
                                       args);
 
   return new Promise((resolve, reject) => {
     let wpl;
 
     // If the user just closes the window we need to reject
     function unloadlistener() {
       window.removeEventListener("unload", unloadlistener);