As for Orion: while I like the idea of having a browser that’s neither Chromium nor Gecko in the mix, Orion is made by Kagi which, at least in the past, self-described as an AI company, so I’m not sure how much I trust their stance to keep slop machines out of it (spoiler: I don’t). Also their CEO seems like a bit of a twat.

And it’s not really open source either apart from the WebKit parts as far as I know.