Makes life a little easier :) Rated 5 out of 5 stars

One possible issue: If the word you're searching for is listed more than once on the visible page, the subsequent words will not be centered when you click the find Next button. Only if the word is offscreen does it get centered. Not necessarily a bad thing or good thing but some people might prefer to have every word centered while others don't care. Maybe you can give an option for this?
Anyways, thanks for this little add-on White Alice0775. I love how many of your add-ons are for fixing tiny annoying problems of firefox. It makes our browsing experience so much better and easier. If Mozilla included most of your add-ons to Firefox it would be such a nicer browser to use! Thanks!

This review is for a previous version of the add-on (0.2010070901.1-signed.1-signed). 

No, I do not have plan to add any option.
Please use other Extension such as XUL/Migemo(not working with Firefox yet).