What it was
A simple proxy switcher with named profiles, a rival to Switchy. Proxy SwitchyOmega and its Manifest V3 fork ZeroOmega are the current standard.
Succeeded by Proxy SwitchyOmega 3 (ZeroOmega)
The earlier extension is gone, but its role is filled today by Proxy SwitchyOmega 3 (ZeroOmega), with 900K users and a 4.3 rating. See its statistics and history.