If your like me and you hate reading the web and let someone (the computer) read it for you then mac has a good feature that lets it read any selected text. The procedure follows:

* Open System Preferences
* Go to Speech
* Text to speech tab
* Then select Speak selected text when the key is press
* Enter your key combinations
* and your done.

I tried it using firefox and it works perfectly. I hope Orca on Ubuntu would worked properly by default.