what are the best toolbars?

Allows you to save pages to your computer for easy loading later. Lets you make changes to pages etc etc etc. Very useful

Includes anti-phishing stuff which is a very good idea and a google search and similar options.

Firefox add-in. Do a google search and it links to yahoo search, altavista etc etc. Also can hide cookies and ads and stuff. Can edit all the options

Useful if you use google notebook

Firefox add-in similar to Opera sidebar - moves everything over to one side except main window

Sorts your tabs better then firefox does!

Speeds up firefox. Warning - the default setting exceeds the RFC (the standards) and _will_ hammer servers so you may want to change that!

Ever find a website that is down? This will load a page allowing you to try the google cache / corel cache etc of that page. Doesn't always work (at least for smaller pages) but does for the bigger ones.

Firefox Add-in that moves the download window to the status bar

Set up what websites to open on what days and it will do this for you. Cool if you like opening different pages on different days. So dilbert would be daily, but maybe otavo is for every other day. This firefox add-in does this for you

Firefox add-in to put weather forecasts in the statusbar

Lets you view source / amend CSS on the fly / remove cookies etc etc. Useful when testing out pages

Turns off javascript for safer browser. Simply click in the status bar to allow permanently or temporary access for that website. Makes your web browsing a lot more secure!

By itself, this does nothing. However you can download a ton of greasemonkey scripts ot do all manner of things on websites for you. Like one I use that moves things around on Google Reader to fill the screen better