If you absolutely must visit a proxy, use a dedicated, updated source like torrents.me or proxybay.github.io (note: these aggregate general proxies, not official ET ones).
In a 2023 interview (published by TorrentFreak), the original ExtraTorrents operator, known as "SaM," stated he has no intention of reviving the site. He has moved on to legal tech projects. The domain extratorrent.com now redirects to a generic sports betting site. extratorrents proxy links