Doesn't convert Rated 3 out of 5 stars

does not work on firefox 9. I tried it on yahoo japan and amazon japan, there is no change.

EDIT: Sorry, misread. It would be nice to have asian currency conversion rates such as Japan Yen and Chinese currency.

Also, if it could auto-convert the price in the page without use of manually pushing a button. Thanks.

This review is for a previous version of the add-on ( 

Of course it does not work on these sites. As stated in the add-on description: it will convert only dollar, pound, euro and rubles currencies to any other currency. It will not convert yens. So the add-on didn't deserve the rating of 3/5. If you want converting yen, you could ask to add this feature to the next update

The add-on remembers the last state (enabled/disabled). So if you push the button and turn the add-on on then it will auto convert till you will turn it off.
I'll see if it is feasible to add Japan Yen and Chinese currency in the next update

There are some difficulties to implement these:
1. ¥ is used for JPY and CNY. so it is impossible to choose automatically what to convert
2. There are many different symbols for Asian currencies

To implement these the design of the options should be changed.