Looks like Kagi got new favicon - good news, no more "g", bad news is it looks a little rough around the edges when saved as default search in Firefox (which is a shame because it then appears on every new tab looking shabby).
See below screenshot - when adding it looks sharp as a tack, but once its saved, it looks rough. This does not appear to be as significant of a problem for Brave or DDG, so not sure how they're stored differently.

Favicon should look consistently good once stored as default search engine.