Let's start with the menu bar. To turn different bars on and off, you can use one of these methods to show the toolbar list and select the desired bars there:

• right-click a blank spot on the tab bar (or the "+" button)
• tap the Alt key to activate the classic menu bar > View > Toolbars
• in Customize mode > Show/Hide Toolbars (see: Customize Firefox controls, buttons and toolbars)

To turn on the Menu Bar, Bookmarks Toolbar, or other bars, click it on the list.

With respect to Tumblr, does Firefox show the plugin notification icon in the address bar?

The icon typically looks like a small, dark gray Lego block. When the page wants to use a "blocked" plugin, the icon turns red to alert you to the concern. (You would want to update in that case, the latest in the 13.x series is here: https://www.adobe.com/products/flashp.../distribution3.html - scroll down)

If you click the icon, does it indicate that Flash is allowed on Tumblr, or blocked?

Also, if you find you've lost something irreplaceable in the Refresh, or it would take too long to reinstall your extensions, there is a multi-step way to roll back to your old profile. This post has the details: https://support.mozilla.org/questions/1069219#answer-762489