IIRC, Mozilla doesn’t ship Firefox with DNS-over-HTTPS (DoH) enabled by default in most countries – and I think it only does Encrypted Client Hello (ECH) if DoH is enabled.

From LibreWolf’s website:

By default DoH is not enabled in LibreWolf.

I assume that also disables ECH by default.

No; I just thought it was probably a typo but wanted to make sure I’m not missing a pun or something.

Shouldn’t that be Seibaa (セイバー)?

I recognize some of the characters:

• Akiyama Yukari from Girls und Panzer (top left corner)
• Oumae Kumiko from Hibike! Euphonium (center – brown hair and yellow eyes)
• Kuriyama Mirai from Beyond the Boundary (right – with glasses)

but I don’t recognize the others.