Bug 1380996 - avoid intermittent 'TabListener.jsm is not allowed before handling user events' failure by blacklisting only before first paint, r=me.

browser/base/content/test/performance/browser_startup.js

@@ -64,6 +64,8 @@ const startupPhases = {
       "nsSearchService.js",
     ]),
     modules: new Set([
+      "chrome://webcompat-reporter/content/TabListener.jsm",
+      "chrome://webcompat-reporter/content/WebCompatReporter.jsm",
       "resource:///modules/AboutNewTab.jsm",
       "resource:///modules/BrowserUITelemetry.jsm",
       "resource:///modules/BrowserUsageTelemetry.jsm",
@@ -88,8 +90,6 @@ const startupPhases = {
       "nsPlacesExpiration.js",
     ]),
     modules: new Set([
-      "chrome://webcompat-reporter/content/TabListener.jsm",
-      "chrome://webcompat-reporter/content/WebCompatReporter.jsm",
       "resource:///modules/RecentWindow.jsm",
       "resource://gre/modules/BookmarkHTMLUtils.jsm",
       "resource://gre/modules/Bookmarks.jsm",