Firefox Tops Vulnerability ListSource:
According to Cenzic, Firefox accounted for 44 percent of all browser vulnerabilities reported in the first half of 2009.
20 Essential Tweaks and Tips Every Firefox User Should KnowSource: maximumpc.com
Firefox may be your default browser, but that doesn't mean you really use it to its full potential. Mozilla's browser is a big threat to Microsoft not because it's fast and full of unique features, but because it's also extremely customizable.
Firefox Foils Microsoft's Security HoleSource: PC World
If you use Firefox, you may have already seen a pop-up from your browser alerting you that it is blocking the Microsoft .NET Framework Assistant and Windows Presentation Foundation add-ons. It's for good reason.

I've stopped as of October 11, 2009.
Google Toolbar Now Translates Pages In FirefoxSource: TechCrunch
Google has launched a new version of its Toolbar for Firefox that lets you translate any webpage with the click of a button without leaving the page. Google will also add web-site suggestions and sponsored links to the toolbar as you type in any query.
Firefox 4.0 Coming Late Next YearSource: hothardware.com
Look for Firefox 4.0 late next year, likely around October, according to a draft roadmap Mozilla updated on its wiki.
According to the wiki, this is what users should expect:
Why corporate IT should unchain our office computersSource: Slate
During a town hall meeting for State Department workers last month, an employee named Jim Finkle asked Hillary Clinton a very important question: "Can you please let the staff use an alternative Web browser called Firefox?" The room erupted in cheers.
Firefox passes billion milestoneSource: BBC News
The open-source browser Firefox passed its billionth download on Friday, ahead of the release of its fourth iteration.
The milestone includes downloads of all versions of the web software since its first release in 2004.
Firefox 4.0: Early Screenshots ReleasedSource: Mashable!
The pace at which Mozilla works can seem insane. It was less than a month ago when the the company released Firefox 3.5. Only three weeks later, Firefox (Firefox) posted screenshots of Firefox 3.7, which includes a change to the Tools bar and an Embracing Glass design.
For Mozilla and Google, Group Hugs Get Tricky Source: The New York Times
BOXES lined the cubicles and hallways in the offices of Mozilla on a recent afternoon, and its chief executive, John Lilly, seemed a bit disoriented as he looked for a place to sit.
Mozilla gives add-on developers a tip jarSource: CNET.com
Mozilla has introduced a new pilot program for Firefox developers to make a little money off add-ons they've created. Developers now have the option to place a "contribution" button on their add-on page, which lets users donate any amount they wish via PayPal.
How to Debug PHP Using Firefox with FirePHPSource: sixrevisions.com
This article shares an elegant, simple, and more maintainable way of debugging Ajax apps via the web browser (more specifically for the Mozilla Firefox browser).