I don't think you can now. I really dislike the new three-dots menu, now it's hidden a bunch of functionality behind the "More" submenu solely to give an overly large amount of space to other options.
btw for others, If you don't see the "Secret Settings" section, you can enable it by tapping on the Firefox logo a few times (it's in About Firefox).


Brilliance also has a page on that site - that image looks familiar, was it on the box cover?