Comment 3 for bug 1925787

Never mind the multiple requests thing, it's not going to work at the moment anyway, because it's using async notifications rather than waiting for the hook to answer. So that needs a 0.3 protocol :)

Anyhow, negotiating 0.2 shouldn't be too hard. If you see 0.2 in the versions list, respond back with 0.2 instead of 0.1.