Horse doesn’t work like the browser you’ve been using. The sidebar isn’t a list of tabs, it’s a map of where you’ve been. Clicking a link branches from the source page rather than overwriting it, so the route remains visible until you choose to delete it.
That’s the whole idea, and once it clicks the rest is small detail. The five posts below get you to the click.
When you’re through the series
The rest of the manual covers the specifics: sidebar tweaks, tested extensions, password managers, copying Trails® between computers, and the parts of the browser that aren’t navigation.
If Horse is now sitting alongside another browser and you want the longer story of why it’s shaped this way, why Horse exists for ADHD brains is that story.