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Bookmarks Synchroniser : allows you to store your bookmarks in an XBEL file online, automatically download them to your machine when you start Firefox
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FoxyTunes : allows you to control your software media player of choice directly from Firefox
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Sage RSS reader : appears as a sidebar extension to Firefox, and will pick up RSS 2.0, 1.0, and 0.9x and Atom feeds directly
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StumbleUpon toolbar : will endeavour to send you to sites that you will like, based on the recommendations of users with similar preferences to your own
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Add Bookmark Here :simply adds an "Add Bookmark Here" option to all the folders and subfolders in the bookmark structure to allow you to add bookmarks directly into a given folder
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GoogleBar : provides rich internationalisation support, allowing you to direct searches to your "local" Google, rather than defaulting to
www.google.com, and to control features such as the number of saved searches.
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Google PageRank : simply adds a panel to the Firefox staus bar, at the bottom of the main browsing window, that displays the current page's PageRank both visually and numerically
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Google Preview :dynamically updates your Google search results to include previews of the pages that have been returned. The previews are drawn from
ThumbShots . For the bandwidth-conscious, the extension can be activated and deactivated by clicked the "GP" text that appears in the Firefox status bar when this extension is installed.
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Disable Targets for Downloads : eliminates the blank browser window that pops up onto the screen when you start a download of a binary file.
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AdBlock : you can block images, Flash animations, iframes, scripts, and other Web page elements based on their source address, either as a wildcard or a regular expression
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ForecastFox : is an interface to some popular weather sites, but you can set it to display mini icons in the status bar or the main Firefox toolbar.
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QuickNote : makes it easy to send highlighted text directly to a file, and will even append the URL of the site on which you found the text for handy reference. QuickNote will open up in a tabbed browser window, a floating window, or as a sidebar, depending on your preferences, and you can set up multiple tabs within an open note.
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Chatzilla :began as a separate component of the Mozilla suite. Now it's a lightweight extension that adds IRC chat to Firefox.
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ViewSourceWith : Allows you to open the currently loaded page's source in the editor of your choice with a right-click. This is helpful for complex sites you might want to see in a more featureful editor, like Bluefish or PageMaker. You can configure it to offer a list of several editors.
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ieView : which opens the current page in Internet Explorer for a quick comparison of the same page in different browsers. This saves you the distraction of copying and pasting a link into Internet Explorer
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