Regardless of the version of IE that you have in the windows machine will always use IE6 inside any desktop application that you put a webbrowser. That means you will not have multiple media that the newer versions of IE have, such as JQuery or even Json support.
To solve this problem you must make a change in the windows registry for your executable, saying you want to use the most current version of the browser.
Create a .reg file with the following structure:
REGEDIT4
[HKEY_CURRENT_USER \ Software \ Microsoft \ Internet Explorer \ Main \ FeatureControl \ FEATURE_BROWSER_EMULATION]
"MyExecutavel.exe" = dword: 0
I already used chromium in Delphi as an alternative to a couple of years ago, and it was soooo unstable.