While orion is good option, it is not there yet in terms of comparison with Firefox on Android. Many of the extensions will install but will not actually work. Even uBlock origin will have problems. Also it is common that an update will make the browser crash very often (happened with few updates). Also they don't provide a list of APIs they support and it is not open source (although they said they will but at this point I don't think they will any time soon).
If you wrote a function in a dynamically typed language and the documentation said "this accepts integers", but actually it crashed if you gave a prime integer and you only expected people to give it composite integers, people would say that the documentation was inaccurate.
You changed the phrase from “runs Windows software and games” to “compatible with Windows software and games”. I’m talking about the former phrase. The latter does imply more, but I didn’t say it; you did.
Running Windows software on Linux requires a bit of domain knowledge; e.g. Wine, Lutris, Proton. E.g. which software actually works really well, which software works with tweaks, and which software largely works but you need to avoid certain features. The fact that you need to install special software, and it isn't some core OS compatibility layer like 32-bit support makes it lean towards "runs Windows software and games" being a little ambitious. It's not a perfect user story, that's all.
Orion is based on WebKit, that's usually what people mean when they say it is all safari. So it is technically correct but orion approach ia to try to implement web extensions API in WebKit. Otherwise, apple wouldn't have allowed orion on App Store because the requirement is not to use any other engines (holding off to see what EU DMA effect would have).
Not op, but you cannot fault the author for not knowing every app or trend. With any luck, your reply will inform the original author, who may learn a thing or two from the discussion we are having here!