While I don't normally use Kagi's "Privacy Pass" extension to search without being logged into #Kagi.
I've found it perfectly solves a problem I have with private browser tabs.
As a dev, I often open a private tab to test a website. I might randomly decide to search something real quick. However, because I'm not logged into Kagi, I just see the Kagi sign-up screen.
In #Firefox, if I allow "Privacy Pass" to run in Private Windows, my searches from the URL bar now magically work.