Firefox Text To Speech
Making the computer read out text aloud can be useful in several situations. The most obvious is as a aid for blind people but it can also be helpful if you cannot look at the computer screen at that moment.
Speak It was a very popular Firefox add-on. It is listed to be compatible with Firefox 2 only at the official Mozilla homepage but a user changed the compatibility of the add-on and made it compatible with Firefox 3 as well.
It utilizes text to speech capabilities of the operating system to provide the means to read out text aloud to the user. It integrates itself nicely in the right-click context menu and can be used to read out all of the text on a website or only the selected text.

It comes with some options to configure the add-on. It is possible to change the read rate and volume. There is also the possibility to change the text to speech engine if more than one engine is installed on the computer system.
Author: Martin Brinkmann
Firefox Text To Speech
TalkingClipboard.com is a much better and free Text to speech addon for Mozilla Firefox. It requires no registration and purchase.