I'm not the OP, but Orion supports extensions from both the Firefox and Chrome ecosystems. It also supports the WebRequest API in blocking mode, meaning you can use uBlock Origin, which you can't use at all with Safari.

Oh wow, thanks for highlighting the extensions piece. That's huge! Going to give it a go as well.

Although the extensions will install, good luck getting them to work properly. Even the ones that the browser recommends to install, they are extremely buggy still. I hope one day they’re able to get extensions working better.

That's why it's still in beta. But stable enough for you to use it, as SnazzyQ says.

So is all uBlock Origin functionality supported, 100% ?

I believe that's the long-term plan though last time I tried it (a few months ago) it didn't work for me.

Web Extensions support, built in adblocker and tree style tabs (can be enabled using the option under View menu) are the biggest ones for me.

And the built in tree style tabs are real tree style tabs with indentation, not just vertical tabs like on Edge.

Orion is absolutely amazing.

I wish I loved the browser. It's just close enough to Safari that I use it the same but it's just different enough where it drives me absolutely nuts.