From author's site:

CLiCk, Speak is an open source, freely available extension for the Firefox web browser. It is part of the CLC-4-TTS Suite of products, it features a mouse driven interface, and it reads web pages - hence its name.

Reading with a simple interface - CLiCk, Speak is designed to be as easy to use for sighted users as possible. The interface is completely mouse driven; there's no need to remember any key combinations. Reading through a page is as simple as placing the cursor and hitting the GO button; reading a selection is as easy as highlighting the text and hitting the SPEAK button.

From author's site:

Tab Mix Plus enhances Firefox's tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager with crash recovery that can save and restore combinations of opened tabs and windows.