A Firefox Add-on that allows you to open your most-needed sites super-fast using one hotkey (ctrl+space by default) to bring up the 'Launcher' overlay, followed by the key indicated in the overlay for the site you want. Highly customizable.

Send Tab URLs creates a list of URLs from all browser tabs in the current Firefox window. This list can be emailed using your favorite email application; starting with this new release, it can also be copied to the clipboard for pasting into another application. Version 2.0 adds support for Gmail as well as additional email applications on Windows. Send Tab URLs is available for download from Mozilla Add-ons.

This tool is great for sites that use lots of checkboxes like a registration form or your Hotmail or Yahoo! inbox. Imagine this: Your Hotmail inbox has 10 spam messages and you don't want to click on 10 separate checkboxes just to select them all. Now you can select them all just by drawing a box around them! To begin drawing a box, your mouse MUST first be positioned over one checkbox. Then drag to activate this tool.

FoxVox will speak any text you highlight in a web page. FoxVox is ideal for having blogs, email, news articles, and ebooks read to you while you surf the web or do other work. FoxVox supports speech in many different languages. It runs under Windows and Linux without any additional software.

Add a Fast Forward button to your browser. Pressing it forwards you to the top page people visited next.

It's like Amazon recommendations for webpages - "People who viewed this page also viewed this other page next".