On https://www.netbsd.org/gallery/mobile-logos.html one link is an FTP URL: ftp://ftp.netbsd.org/pub/NetBSD/misc/jschauma/background.jpg.bz2 Unfortunately, Mozilla has removed FTP support from Firefox, meaning Firefox doesn't do anything useful upon following this link. However, this URL works just fine: https://ftp.netbsd.org/pub/NetBSD/misc/jschauma/background.jpg.bz2 An http: URL could also work just as well.
This is an optional change, but given most people will be looking at mobile-logos.html in a web browser, it makes sense to use an HTTP or HTTPS URL.
