updated Review with firefox6 Rated 5 out of 5 stars
Previously I had problems with all the buttons not working after updating from firefox 5.0 to 6.0. Reinstalling the add-on did not fix the problem.
However, if I create a new profile (http://support.mozilla.com/en-US/kb/Profiles), reinstall Tong Wen Tang, now everything works normally. ** A new profile will erase all your bookmarks, history and extensions. You can use the FF sync feature to regain all your bookmarks and history, but you will have to reinstall all your extensions. You may consider making a collection of your extension on FF addon site.