If you spend most of your computing life in Firefox, it makes sense to consolidate other online activities in your browser. There are extensions that can help you to do just that: you can manage your bookmarks with the del.icio.us extension, chat on IRC channels using Chatzilla, and read RSS feeds in Sage.

At first sight, the Read It Later (RIL) extension looks redundant -- after all, you can use Firefox's own bookmarking functionality to save Web pages for later reading. But dig deeper, and you'll discover that it offers enough nifty features to make it a must-have tool for most users.

An extension to browser Firefox will suggest cheaper prices for products you browse on the internet.

I spend an enormous amount of time browsing the web looking for new ideas to write about, so one of the biggest problems for me is tagging articles for more careful reading later.The solution to this problem is to have a good mechanism for tagging a page as "to be read", and then be able to easily retrieve them at a later date.

Why bother using a dedicated FTP client when you can use FireFTP? This nifty extension turns Firefox into a full-fledged FTP tool, so you can transfer files back and forth without leaving the browser. FireFTP offers all the features you'd expect from a decent FTP client.
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Installing FireFTP is a matter of clicking on its .xpi package and restarting Firefox.

Flock is "The" Social Web Browser. Take Mozilla's Firefox, insert native del.icio.us, gmail, blogger and flickr support (to name just a few) and you'll have something close to what Flock has to offer.

Ever wished you could display more than one site in Firefox at a time? I'm not talking about tabbed browsing, I'm talking about seeing two sites next to one another without having to juggle two browser windows. Firefox doesn't do this natively, but with the Split Browser extension, you can juggle two or more sites in one browser window

"[...]it's official: while Firefox 3 boasts some great new features like a smart address bar and better bookmarks manager, the best reason to upgrade will be for the performance improvements. Firefox 3 is noticeably faster and more stable than Firefox 2 to the casual user and Mozilla engineers have numbers that show it will be the fastest browser on the market."

Firefox only (Windows/Mac/Linux): Popular Firefox extension Tab Mix Plus has finally released an update supporting Firefox 3, meaning that the tabbed browsing enhancements you'd come to know and love with TMP in Firefox 2 are now ready for your updated Firefox install