The final scores are (out of 35 possible)

• Google Chrome 4.0.302.3 (dev): 25
• Google Chrome 4.0.249.78 (stable): 24
• Firefox 3.6: 20
• Firefox 3.5.4: 21
• Opera 10.5 Pre-Alpha: 25
• Opera 10.01: 15
• Safari 4.0.4: 19

And the conclusions:

If you’re using Opera 10.01, you have almost no reason not to upgrade. If you’re using Chrome, the Stable channel is pretty much a wash with the development version, barring any new features that make their way first to the dev channel (which, granted, some certainly will). Firefox 3.6 seems more of an upgrade in features than core components, and Safari, well, doesn’t it have a really neat launch page?

The new version of Firefox, 3.6, is about 15% faster than Firefox 3.5, according to tests run by Computerworld. Firefox now renders JavaScript three times faster than Opera 10 and about four times faster than IE8. This data places Firefox as the 3rd fastest browser on the net – after Safari and Chrome. If you want to read more about the Java speed-ups on Firefox, there’s a lot of info here.

According to StatCounter Global Stats, 30% of internet users worldwide use Firefox for web browsing. Internet Explorer has about 55% of the market.

Source: StatCounter Global Stats – Browser Market Share

More improvements and new features in Firefox 3.6

• Stability: Mozilla says Firefox 3.6 is less likely to crash than prior versions.
• Personas: choose from 35,000 themes on offer that let you customise the way that Firefox looks.
• Better form completion: when filling out an online form, Firefox suggests information for fields based on your common answers in similar fields.
• Video and Audio: with the world’s best implementation of HTML 5 audio and video support, video can now be displayed in full screen mode.

(click to enlarge)