LiuChan by Geza Kovacs

A modern lightweight mouse-over popup dictionary for Chinese! Displays definitions, pinyin and/or zhuyin, customizable tone colors, as well as Cantonese pronunciation (Jyutping). Source: <a rel="nofollow" href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/386728d61b8a5a97e68faa14fe4e0e53f0609ece44a1bbd2b435213919eeaeeb/https%3A//github.com/gkovacs/LiuChanFirefox/tree/firefox">https://github.com/gkovacs/LiuChanFirefox/tree/firefox</a>