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If you have not yet installed Mozilla Firefox, with these fabulous extensions you will understand why it is the best companion of navigation on the web.
1 - Google Toolbar
Take the power of Google with you anywhere on the Web
2 - Secure Login
Secure Login is a login extension for Mozilla Firefox integrated password manager.
Its main feature is similar to Opera's (the browser) Wand login.
3 - gTranslate
With gTranslate you can translate any text in a webpage just by selecting and right-clicking over it. The extension uses the Google translation services to translate the text.
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4 - AutoCopy
Select text and it's automatically copied to the clipboard. Like Linux or mIRC.
5 - Right-Click-Link
Opens selected text in a new tab.
6 - Site Launcher
SiteLauncher is an add-on for Firefox that gives you a super-quick way to to open your favorite websites using only your keyboard. One special hotkey brings up the 'Launcher', followed by a unique key to launch a site.
7 - TwitterFox
TwitterFox is a Firefox extension that notifies you of your friends' status on Twitter.
8 - TinyURL Generator
An extension to silently generate a TinyURL for your current page at the click of a button.
[via blogdazero.blogspot.com]