Here's a tip I found here. In your Firefox address bar type: "about:config" (no quotes). This displays a page listing all (or at least many) of the user-configurable options available in Firefox. Definitely for advanced users. You can also use ChromEdit to personalize your browser experience. Again, for advanced users only.
I don't know who pays the bills at eWeek, but headlines like Security Flaws Haunt Open Source Software are not helpful. If you read the article, the "haunting" seems quite tame:
The phpBB Group has fixed the vulnerability and is strongly recommending that users upgrade to 2.0.12.
Browser security is important. That's why Firefox released 1.0.1 this week. You should upgrade as soon as possible to fix a vulnerability. On the other hand, once the release is out there, do we really need articles like this? The headline is despicable: 8 More Bugs Found In Firefox And Mozilla. Once again, all the bugs have already been fixed. AP has a much more responsible headline: Firefox Browser Fixes Security Flaw. It's okay to report the barn door is closed. You don't need to pretend that the cows are on fire.
While Mozilla immediately fixed bugs, Microsoft continues to promise to fix bugs. IE 7 is mostly a security release with a few features added in. Mozilla just hired more staff to focus on security and increased bounties on bugs -- rewards paid to people who find and report exploitable vulnerabilities in Firefox. Report a vulnerability in IE and you'll likely be sued under the DMCA.