Lately J.O. of Beijing made speak about them. From more the Chinese language am more and more appraised by the Westerners, notably by the businessmen and the tourists.
BBDict is a tool of translation reserved between English and Chinese. It is an extension Firefox. You only have to choose word, expression or sentence and to click on "BBDict" in the contextual menu to carry out translation.
Translation will be directly acquired in the thumb-index if you have already opened pages dict.cn or iciba.com. Otherwise, it will be acquired in a new thumb-index.
I recommend that you use this extension along with google-toolbar(or other extensions) which provides an excellent Instant-Translation functionality if you just want concise explanation sometimes.