lio45 Frictionless nav is always an ongoing process. What specifically are you trying to achieve?
On mobile, you can rapid scroll by either flicking the feed rapidly (like a Twitter thread). Or you can click the topbar to get a "dragable slider" for more precision. Snapshot below. This exists on desktop too on the sidebar.
If you're trying to get back to the "thread list page", you can click the "Home" button on the bottom. It will take you to the picture tiles, and you can reach threads there. It's a two-click process, but was the least confusing I could come up with.
Also, back buttons should be plentiful and working on most pages.
But maybe I'm misunderstand your desires? Let me know!
