Martin (baeuml) originally built Chess.com Notifier.

With his approval I've forked the original source code to include alert and sound notifiation. I'm looking for testers to download and use the add-on and report back here.

Download the latest Firefox version from my google.site. Thanks

Version 2011.5.22.1321 of Chess.com Notifier can be downloaded for testing on Firefox 4:

https://bitbucket.org/deExaminer/chesscomnotifier-dx/downloads

Please test and report likes/dislikes and Firefox version. Thanks :-)

(No testing on Firefox 5 yet - added to my todo list.)

I've downloaded the .xpi file but where does it go?

1. download the file (unzip if necessary)
2. drag-and-drop the XPI file into an open Firefox window
3. restart Firefox
4. 

Thanks. Never added an add-on that way. Worked great.

So far works ok

Great addon by the way. Good job. Would be nice if you could make a move directly in this addon, however that might be hard to implement.

Thanks for your thoughts Vladan88 

It would be tricky implementing moves within the Firefox add-on; but it might be possible to do it in Google Chrome version ... I might work on that.