LuisBrowser is a concept for what a browser looks like when the default search engine isn't decided by whoever owns the browser -- built around LuisSearch instead of a big-tech default nobody actually picked.
Actual screenshot -- LuisBrowser running on Linux with LuisSearch set as the default search engine and homepage. Not a mockup.
Billions of searches happen every day without anyone consciously "choosing" a search engine -- it's just whatever the browser shipped with. That's a distribution advantage no amount of ranking quality can compete with from outside.
Not reinventing the rendering engine -- just refusing to let the default search engine be a decision made for you.
Real crawled index, real BM25 ranking, AI reranking on top -- set as the actual default, not an option buried three menus deep.
Built on Firefox's existing open Gecko engine rather than reinventing HTML/CSS/JS parsing -- the goal is the default, not the rendering pipeline.
No sponsored "default search partner" deals -- whatever ships as default is a deliberate choice, stated plainly, not sold to the highest bidder.
Quick access to LuisCloud, LuisAI, LuisForge, and LuisWiki baked into the new-tab page instead of generic shortcuts.
There's a real, runnable Linux build and a macOS setup script now -- both genuinely Firefox under the hood (same Gecko engine, unmodified), just reconfigured via Firefox's own enterprise policy system so LuisSearch is the enforced default search engine instead of a big-tech default. It's not a from-scratch browser engine (that really would be a huge undertaking) -- it's a real, honest repackaging of an existing one. Windows isn't packaged yet.