Test Targets: the top 3 browsers with the biggest market share, namely, IE, Firefox and Chrome
Test Games: We selected three popular games of different genres, the PHP-based Dragon’s Call([url=http://dc.gamedp.com]Dragon's Call Official Site[/url]), the Java-based Runescape([url=http://runescape.com]RuneScape - The Number 1 Free Multiplayer Game[/url]) and the Flash-based Evony([url=http://evony.com]Evony-Free forever[/url]).
Test Procedures:
1. Test the loading speed of each game’s official site: before testing, we cleared all the history, caches and cookies of three browsers and kept all settings of them basically the same.
Test Tool: [url=http://www.webwait.com]WebWait - Benchmark Your Website[/url] (it’s the most popular website loading speed test site)
Test Method: loaded the pages for consecutive five times every five seconds
Results:

2. Resource usage of each browser during gameplay
Dragon's Call:
1) Resource usage of each browser during gameplay

Results:

2. Resource usage while auto-fighting and browsing other sites (official site, facebook, twitter and google) simultaneously

Results:
http://j.imagehost.org/0513/Test3.jpg
Tested Runescape and Evony in the same way.
Runescape:
http://j.imagehost.org/0908/Test4.jpg
Evony：
http://j.imagehost.org/0715/Test5.jpg
In Summary:
Firefox is fit for the PHP-based Dragon’s Call since its CPU and RAM usage in Firefox is smaller than IE and Chrome, especially during auto-fighting.
IE is fit for the Java-based Runescape.
Chrome is fit for the Flash-based Evony.