OverbiteWX is only for Firefox 56+. TenFourFox and Firefox 52ESR can still use OverbiteFF, which is a superior add-on in every respect for obvious reasons.
New OverbiteWX users, please read the directions thoroughly! And Mozilla, how about a spec for bug 1247628 so we can finally get TCP sockets working in WebExtensions? We can't even scratch our itch because you won't tell us what type of scratching you'll accept!