ScribeFire is a full-featured blog editor that integrates with your browser and lets you easily post to your blog. You can drag and drop formatted text from pages you are browsing, take notes, upload images, and post to multiple blogs.

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Rank Checker

Want to know where your website ranks in the search results? This Firefox Rank Checker extension allows you to easily check your website rankings in Google (US and international), Yahoo, and Microsoft Live search.

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TimeTracker

Do you spend too much time on Firefox? Do you open tabs faster than you can close them? Cannot get things done? Keep track of how much you browse with TimeTracker.

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LinkChecker 0.6.3

Check the validity of links on any webpage.

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SEO Link Analysis

Link data in Google Webmaster Tools, Yahoo! Site Explorer and Microsoft’s Webmaster Portal is pretty static, they give you the pages a site has links on, and let you do all the analysis with other tools. That sucks if you want to do a quick analysis of a site, or want to get a quick overview of inbound anchor texts for a site.

This Firefox extension gives you a bit more information when opening such pages, it gathers the PageRank for the linking page, the anchor text used on the link, and checks whether the link is nofollowed or not.

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Link Diagnosis

Easily see backlinks from your competitors
This tool can show you all the important information about your competitor’s links. The report includes pagerank, anchor texts, no-follow information and more.

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Zemanta

Contextually relevant suggestions of links, pictures, related content and tags in every popular blogging dashboard will make your blogging fun again.

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Clipmarks

Instead of copying and pasting links, Clipmarks is like adding a pair of scissors to your browser, letting you capture exactly what you want others to see (text, images or video). Your clips are saved on clipmarks.com and can easily be syndicated to FriendFeed, Twitter, Facebook or other sites. You can also post anything you clip directly to your blog (supports WordPress, Blogger, Typepad and more) or send it directly to friends or co-workers via email. Clipmarks also gives you a way to help the environment by printing only the parts of a page that you need. By printing just what you need, you’ll save ink, paper and trees, thus making a contribution to a cleaner environment.

Your clip collection is accessible from any computer with an internet connection, including your iPhone, Blackberry, or other mobile device.

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Copy as HTML Link

Creates an HTML link to the current page using the selected text and copies it (into the clipboard) for pasting into other…

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CSSMate

Inline CSS Editing Evolved. Originally a port of the fantastic EditCSS tool that i’ve been using for many months. I’ve gutted it, made each stylesheet load into a seperate tab.

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Screengrab!

Screengrab saves entire webpages as images.

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Pencil

Pencil is a Firefox add-on to do GUI prototyping and simple sketching.

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Live HTTP Headers

View HTTP headers of a page and while browsing.

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Technorati

A real-time search engine that keeps track of what is going on in the blogosphere.

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Flash Video Resources Downloader

Like the VideoDownloader extension, but up to date on changing sites & supporting new sites constantly. Sick of using the VideoDownloader extension that is outdated, doesn’t work with half the sites it used to & doesn’t work with ANY of the new sites? This extension keeps up to date on video sites when they make updates to stop from being downloaded and is constantly adding new sites. It just adds a small icon to the status bar of your Firefox browser. Just click it to download the video you are watching!

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Download Embedded

Downloads all or selected embedded objects on a webpage. Can be used for downloading movies, mp3s, flash, quicktime, or other embedded files (although this does NOT work on video embedded in flash ( youtube, video.google.com, etc.. )

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Firefox Universal Uploader (fireuploader)

This extension allows to upload/download files from your favorite websites using a simple interface. Below is the list of all websites supported by Fireuploader.

In this version, Snaphappi (a digital photo processing website), Slideshare.net (Share your presentations) and Adobe Share has been added. You can make PDF documents using Adobe Share. Upload any word/image document, download it in PDF format.

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Deng Google Bookmarks

Allows you to access and manage your Google Bookmarks

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