The old compact three dot menu can be used one-handed and has the option for a new tab at the top, the new UI shows less features at once, is missing the new tab option (because Mozilla's neurodivergent users can go to hell I guess) and can ot be used one-handed (because screw the physically disabled, too). If this gets pushed on us woth literally no option to roll back I know multiple users, including me, who're planning on switching to a chromium based browser.
