[jamy015]

I'm not sure how your Firefox ended up like that. Mine has the QR button, mic button and X button when entering a URL, or the reader button, tab button and menu button when viewing a page. The back/forward and refresh buttons are inside the menu ('three dots').

[chias]

Interesting -- it was a fresh install on a Nexus device that had never had Firefox on it before. I'll explore the UI options.