Dual toolbar in my and a lot of peoples opinion is better for browsing on mobile, people who've used Samsung internet or Brave actually say that a lot, i believe it should be an option in Firefox. (Unsure if on iOS)
Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.
Similar idea here: Ability to have an optional second toolbar in Firefox Mobile
never-displayed