A name with no bundled brand glyph had nothing to render, and the renderer
could not go find one — CORS makes another origin's markup unreadable.
So resolution moves to the main process: read the page, collect every icon
it declares in its head and web manifest, rank them, sniff the bytes to
catch a challenge page served as image/png, and cache the answer per host
on disk. Only ever the site's own marks — a public icon service would
answer for the hosts behind a bot wall, but asking one means telling a
third party which tools someone is wiring up, so an unreadable site keeps
its monogram instead.
Brooklyn Nicholson