This is in response to Why I’ve Switched From Chrome to Firefox 4 over at Lifehacker.
First off, all of the things they list I agree with and think a great features of Firefox 4, but here's why I'm not switching back.
Chrome continues to be the most secure browser on the market. This year's Pwn2Own only had two teams go up against Chrome and neither was able to use any exploits to gain access to the system. Chrome also packages a light-weight PDF reader and Adobe Flash Player with the browser. Adobe Reader and Flash Player have for many years now been one of the biggest security holes in user's computers. Security flaws are frequently found in both and while Adobe has been much better in recent years about pushing out updates in an timely manner, their auto-update still leaves much to be desired putting responsibility on the user to keep both up to date.
Which brings us to the way Chrome updates, you will never have to update Chrome. That isn't to say Chrome doesn't update, but it doesn't require any interaction from the user to do so. This means that you'll always have the latest version of the browser without having to check for an update and go through the process of installing it. This update will also come with the latest release of Flash so you won't have to be worry about updating that on its own.
I was amazed this feature wasn't in Firefox 4 but Chrome isolates all tabs, plugins, and add-ons in their own process. If Flash crashes for whatever reason (which still a thing), then the entire browser goes down with it. If this happens on Chrome, I just reload the tab and Flash is reloaded without affecting anything else.
Firefox still requires you to restart the browser anytime you install an add-on or change the theme.
Overall, while Firefox is better by leaps and bounds compared to 3.5, when you compare it to Chrome and even Internet Explorer 9, I think it still feels like a dated browsing experience.