Every link you click goes to one browser. Link Rocket sends each one where it belongs — a different browser, a particular Chrome profile, a tab group, or a private window — based on rules you write.
The app itself. Routes links, and creates proxy apps that put a Chrome profile or tab group in your Dock.
Coming to the Mac App Store. This download is how to get it in the meantime, and the two will behave the same.
A small background component. Link Rocket routes links perfectly well without it — the helper is what lets an app raise a Chrome window you already have open instead of opening another one, list tab groups, and keep a Dock indicator accurate.
It installs into your own home folder, has no window of its own, and asks for Accessibility the first time something needs it. That permission is the only way macOS lets one app bring another app's window forward.