Use a bottom sheet for the mobile tabs
For some time now, Firefox Preview/Beta/Nightly/I'm lost in versions uses the following tabs UI:
(Source)
This has an advantage over a completely separate tab page because it's all at the bottom of the screen, so easier to reach on mobile.
Currently we don't have a widget to do that, but it's being worked on by @haecker-felix. There'a an issue for a more advanced variant, which would also allow to have the bottom bar as a swipe-able surface, but here both should work.
It's hypothetical, but opening an issue since we brought it up on the BoF today.
Edited by Alice Mikhaylenko