I don't know how to get a unwalled version. What's the best way to do that these days? xcancel seems unavailable.

xcancel is fine, here's an archive of it: https://archive.is/VeUXH

Thanks!

Install libredirect extension (https://github.com/libredirect/browser_extension/) and select a few working instances. Then you can use the programmable shortcut keys to cycle between instances if one ever goes down.