20 great Firefox extensions

You've seen the lists of Top X great Firefox extensions on other sites, but they all have a different 10 favorites. So how do you decide which are worthy of your attention? We bring you THE definitive list of the 20 best culled from all the top 10 lists we could find.

If your favorite extension is not on the list, let us know.

What it is: Lets you know when you have new mail in your Yahoo Mail inbox. Notification options include: customizable sound, notification alert, status bar and toolbar icon.

Why you should use it: You can map different mouse buttons to open Yahoo Mail in different tabs, windows,etc.

Where to get it: Click here.

What it is: Allows you to manage multiple Gmail accounts and receive new mail notifications. Displays your account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.

Why you should use it: A no-brainer if you are a Gmailer, but there are early complaints that the extension often forgets account passwords and if you use multiple Gmail accounts you are out of luck.

Where to get it: Click here.

What it is: Toolbar that displays the trust worthiness of the site being visited.

Why you should use it: Better safe than sorry.

Where to get it: Click here.

What it is: Helps you to save Web pages and easily manage collections.

Why you should use it: Can save all or just part of a page with full-text search capabilities.

Where to get it: Click here.

What it is: FoxyTunes lets you control almost any media player and find lyrics, covers, videos, bios and more with a click right from your browser.

Why you should use it: If you like to manage your music as much as you like to listen to music while surfing the Web, it's an essential.

Where to get it: Click here.

What it is: Download all the links or images contained in a page and much more.

Why you should use it: It features an advanced accelerator that increases speed up to 400% and it allows you to pause and resume downloads at any time.

Where to get it: Click here.

What it is: A cross-platform FTP client for Mozilla Firefox. Includes drag-and-drop file support, SSL encryption and remote editing.

Why you should use it: Extension includes more advanced features like directory comparison, syncing directories while navigating, SSL encryption, search/filtering, integrity checks, remote editing, drag-and-drop, file hashing -- to name a few.

Where to get it: Click here.

What it is: A collection of tools for figuring out the precise color of a particular area, zooming in on a page detail and spying on certain DOM sets in a page.

Why you should use it: You can get a color reading from any point in your browser, quickly adjust this color and paste it into another program.

Where to get it: Click here.

What it is: Quickly tag pages for posting to and access bookmarks from your del.icio.us account without having to open another window or tab.

Why you should use it: Save as you surf with ease. You can add a description, notes, and tags to the page before saving it. You can also search both your own bookmarks and the entire site simultaneously.

Where to get it: Click here.

What it is: Preview Web links, images, and videos without even clicking. 

Why you should use it: Browse and share Web links and rich media faster. Users can even e-mail a page from the preview.

Where to get it: Click here.

What it is: A simple way to view and manage downloads from a tidy statusbar without the download window getting in the way of your Web browsing.

Why you should use it: Download Statusbar packs in more useful features than the standard download window. The fully customizable interface auto-hides when not in use, allowing full control without interruption.

Where to get it: Click here.

What it is: Makes each tab a different color, making it easier to distinguish which tab is open and what's available.

Why you should use it: A simple and snazzy way to jazz up and organize your browser experience.

Where to get it: Click here.

What it is: Customizable ad-blocker to stop those annoying pop-ups and nauseating Flash ads.

Why you should use it: Filters use either the wildcard character or full Regular Expression syntax. Hit the status-element and see what has or hasn't been blocked.

Where to get it: Click here.

What it is: Capture just the parts of a page you want to keep: a paragraph, sentence, image or even video. No need to bookmark an entire page for just a few key words.

Why you should use it: By clipping your favorite parts of Web sites, you can build a personal search engine for the things that matter to you.

Where to get it: Click here.

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What it is: A tool for digging into the guts of an HTML page and editing code right from the Firefox browser window.

Why you should use it: No need to switch back and forth between an editing environment, FTP application and the browser when tweaking code.

Where to get it: Click here.

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What it is: 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.

Why you should use it: Firefox alone does a decent job of restoring crashed session in a single window. This handles the restoration of more intricate window and tab layouts after a crash.

Where to get it: Click here.

What it is: Embed the Internet Explorer rendering engine in a Firefox tab.

Why you should use it: Web developers no longer need to open two different browsers to debug code or see how a site looks in Firefox and IE, it's all done in the former.

Where to get it: Click here.

What it is: according to Userscripts.org: Greasemonkey allows you to change how your favorite pages behave and look.

Why you should use it: Tons of ready-made scripts available for making things like viewing photos easier to scripts that help dump you out of annoying pop-up sites.

Where to get it: Click here.

Your favorite not on the list? We want to hear from you!

Let us know what Firefox extensions you use and why you love them.