Seems to work fine on my heavily CSS tweaked Firefox. A different add on (Date and Clock) must use CSS since it trashes my FF GUI. But the Clock by wwj works fine. I would do 5stars if it allowed timezone/city to be selected and displayed. As is, it's a keeper, thanks!
ps - please add enable/disable in the add on options. now, i need to disable the add on to turn off the clock and it'd be easier with an on/off control in the options.

希望日期和星期的字体能够自定义，字体大小最好比时间的字体还要更大。
因为时间的字体大小，一般来说不会太大18左右。弹出的日期星期简直就完全看不清啊！

能不能增加一个一直显示将日期和星期的设置？