In the last couple updates my mobile Firefox on my note20 (direct through Google play, fully updated) has lacked (lost) the ability to hold the back button to bring up the history of that tab so I could go forward to a page. It had disappeared a long time ago so I refused to update the browser on my old phone then when I got this one found that it had returned, now it's gone again. PLEASE BRING IT BACK AND LEAVE IT BE. Thank you, Eugene Ps. I don't see the option in the settings anymore either so it's not something I can re-enable myself.