So far I have been using rikaikun chrome extension for translating japanese words on the net, but now I am considering to switch to a japanese to japanese dictionary because I think it would be more useful and would increase my immersion in the language.
The problem is that I couldn't find one.
I mean I know that I can go to a dictionary web site, but getting the translation by clicking over the target word is far more convenient.
Do you know any extensions?
I prefer chrome, but also for firefox is ok.

https://addons.mozilla.org/ja/firefox/ad...ictionary/

This is the only one I've been able to find. Only compatible with Firefox, versions 9 and under.

Thank you I'll check it out.

If you use rikaisama you can change it to use Sanseido's dictionary or an EPWING dictionary.

http://forum.koohii.com/showthread.php?tid=5351

Thank you.
Could you please also suggest a good japanese to japanese epwing dictionary if you know?
It seems what I was looking for anyway.

My current favorite is 明鏡, because the definitions are pretty short and clear.
大辞泉、大辞林、and 広辞苑 are also pretty good. 広辞苑 is kind of like the 'authoritative' Japanese dictionary, so it's really good, but it tends to be harder to read than the others.