Browser handling is way more personal than any other piece of software. It need not be open source licensed but being able to compile and install it from source the exact binary (minus signing) is a huge plus is today's world. Otherwise is "not" doing much from chrome, brave, firefox etc of today. Open source would be cherry on top.

Trust of Kagi search is already there w.r.t both the tool and the company but it is not transferable to Trust to the Orion Browser.